TY  - CONF
AU  - Ha, Yookyung
AU  - Woeste, Jonas
AU  - Gueckstock, Oliver
AU  - Kourkafas, Georgios
AU  - Petrović, Jovana
AU  - Rabasovic, Mihailo
AU  - Krmpot, Aleksandar
AU  - Seifert, Tom S.
AU  - Denker, Andrea
AU  - Kampfrath, Tobias
AU  - Stojanovic, Nikola
AU  - Gensch, Michael
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12167
AB  - In recent years, short pulse lasers have made massive progress and space-ready femtosecond laser systems are under development [1]. Moreover, employing time-domain spectroscopy techniques to identify planetary minerals by their spectroscopic fingerprints in the infrared and terahertz frequency range can have technological advantages over conventional spectroscopic techniques such as Fourier-Transform Infrared or Raman spectroscopy. The advantages are compactness, the possibility to replace bulky optical components by electro-optic/acousto-optic photonic techniques and the potential to be chip-integrable. We focus on one particular time-domain technique, coherent phonon spectroscopy (CPS), which is sensitive to Raman-active modes. Here, CPS is demonstrated in single-color operation and thus the simplicity and its insensitivity to fluorescence background add to the advantages of this technique.
PB  - IEEE
C3  - IRMMW-THz : 48th International Conference on Infrared, Millimeter, and Terahertz Waves : proceedings
T1  - Time-Domain Spectroscopy for Space Exploration at Terahertz energy scales
SP  - 1
EP  - 2
DO  - 10.1109/IRMMW-THz57677.2023.10299070
ER  - 

@conference{
author = "Ha, Yookyung and Woeste, Jonas and Gueckstock, Oliver and Kourkafas, Georgios and Petrović, Jovana and Rabasovic, Mihailo and Krmpot, Aleksandar and Seifert, Tom S. and Denker, Andrea and Kampfrath, Tobias and Stojanovic, Nikola and Gensch, Michael",
year = "2023",
abstract = "In recent years, short pulse lasers have made massive progress and space-ready femtosecond laser systems are under development [1]. Moreover, employing time-domain spectroscopy techniques to identify planetary minerals by their spectroscopic fingerprints in the infrared and terahertz frequency range can have technological advantages over conventional spectroscopic techniques such as Fourier-Transform Infrared or Raman spectroscopy. The advantages are compactness, the possibility to replace bulky optical components by electro-optic/acousto-optic photonic techniques and the potential to be chip-integrable. We focus on one particular time-domain technique, coherent phonon spectroscopy (CPS), which is sensitive to Raman-active modes. Here, CPS is demonstrated in single-color operation and thus the simplicity and its insensitivity to fluorescence background add to the advantages of this technique.",
publisher = "IEEE",
journal = "IRMMW-THz : 48th International Conference on Infrared, Millimeter, and Terahertz Waves : proceedings",
title = "Time-Domain Spectroscopy for Space Exploration at Terahertz energy scales",
pages = "1-2",
doi = "10.1109/IRMMW-THz57677.2023.10299070"
}

Ha, Y., Woeste, J., Gueckstock, O., Kourkafas, G., Petrović, J., Rabasovic, M., Krmpot, A., Seifert, T. S., Denker, A., Kampfrath, T., Stojanovic, N.,& Gensch, M.. (2023). Time-Domain Spectroscopy for Space Exploration at Terahertz energy scales. in IRMMW-THz : 48th International Conference on Infrared, Millimeter, and Terahertz Waves : proceedings
IEEE., 1-2.
https://doi.org/10.1109/IRMMW-THz57677.2023.10299070

Ha Y, Woeste J, Gueckstock O, Kourkafas G, Petrović J, Rabasovic M, Krmpot A, Seifert TS, Denker A, Kampfrath T, Stojanovic N, Gensch M. Time-Domain Spectroscopy for Space Exploration at Terahertz energy scales. in IRMMW-THz : 48th International Conference on Infrared, Millimeter, and Terahertz Waves : proceedings. 2023;:1-2.
doi:10.1109/IRMMW-THz57677.2023.10299070 .

Ha, Yookyung, Woeste, Jonas, Gueckstock, Oliver, Kourkafas, Georgios, Petrović, Jovana, Rabasovic, Mihailo, Krmpot, Aleksandar, Seifert, Tom S., Denker, Andrea, Kampfrath, Tobias, Stojanovic, Nikola, Gensch, Michael, "Time-Domain Spectroscopy for Space Exploration at Terahertz energy scales" in IRMMW-THz : 48th International Conference on Infrared, Millimeter, and Terahertz Waves : proceedings (2023):1-2,
https://doi.org/10.1109/IRMMW-THz57677.2023.10299070 . .

TY  - CONF
AU  - Ha, Y.
AU  - Gueckstock, O.
AU  - Kourfakas, G.
AU  - Petrović, J.
AU  - Rabasovic, M.
AU  - Krmpot, A.
AU  - Seifert, T.
AU  - Pan, R.
AU  - Denker, A.
AU  - Kampfrath, T.
AU  - Stojanović, N.
AU  - Gensch, M.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11815
AB  - Space agencies around the world have the exploration of solar system bodies in the focus of their activities for decades already. The search for traces of life and to a better understanding of the geology of planets, moons and asteroids motivates these explorations. Our (DLR institute for Optical Sensor Systems (DLR-OS)) contribution to this topic is the development of spectroscopic sensors for material identification. DLR-OS is developing a wide range of spectroscopic sensors that reach from passive infrared spectrometers for remote sensing employed on orbiters to active laser spectroscopies such as NIR spectroscopy, Raman spectroscopy or Laser-Induced Breakdown Spectroscopy that are employed on robotic lander missions. Space, weight and power restrictions as well as robustness against harsh environmental conditions are inherent prerequisites for space missions and lead to specific design solutions for these instruments. Driven by emerging technology of space ready short-pulsed (femtosecond) lasers [1,2], we are introducing the new topic of time domain spectroscopies to space exploration. In this work, we present our first results on coherent phonon and THz time domain spectroscopies on space relevant minerals.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
T1  - Femtosecond laser spectroscopy for exploration of space
SP  - 115
EP  - 115
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11815
ER  - 

@conference{
author = "Ha, Y. and Gueckstock, O. and Kourfakas, G. and Petrović, J. and Rabasovic, M. and Krmpot, A. and Seifert, T. and Pan, R. and Denker, A. and Kampfrath, T. and Stojanović, N. and Gensch, M.",
year = "2023",
abstract = "Space agencies around the world have the exploration of solar system bodies in the focus of their activities for decades already. The search for traces of life and to a better understanding of the geology of planets, moons and asteroids motivates these explorations. Our (DLR institute for Optical Sensor Systems (DLR-OS)) contribution to this topic is the development of spectroscopic sensors for material identification. DLR-OS is developing a wide range of spectroscopic sensors that reach from passive infrared spectrometers for remote sensing employed on orbiters to active laser spectroscopies such as NIR spectroscopy, Raman spectroscopy or Laser-Induced Breakdown Spectroscopy that are employed on robotic lander missions. Space, weight and power restrictions as well as robustness against harsh environmental conditions are inherent prerequisites for space missions and lead to specific design solutions for these instruments. Driven by emerging technology of space ready short-pulsed (femtosecond) lasers [1,2], we are introducing the new topic of time domain spectroscopies to space exploration. In this work, we present our first results on coherent phonon and THz time domain spectroscopies on space relevant minerals.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade",
title = "Femtosecond laser spectroscopy for exploration of space",
pages = "115-115",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11815"
}

Ha, Y., Gueckstock, O., Kourfakas, G., Petrović, J., Rabasovic, M., Krmpot, A., Seifert, T., Pan, R., Denker, A., Kampfrath, T., Stojanović, N.,& Gensch, M.. (2023). Femtosecond laser spectroscopy for exploration of space. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 115-115.
https://hdl.handle.net/21.15107/rcub_vinar_11815

Ha Y, Gueckstock O, Kourfakas G, Petrović J, Rabasovic M, Krmpot A, Seifert T, Pan R, Denker A, Kampfrath T, Stojanović N, Gensch M. Femtosecond laser spectroscopy for exploration of space. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade. 2023;:115-115.
https://hdl.handle.net/21.15107/rcub_vinar_11815 .

Ha, Y., Gueckstock, O., Kourfakas, G., Petrović, J., Rabasovic, M., Krmpot, A., Seifert, T., Pan, R., Denker, A., Kampfrath, T., Stojanović, N., Gensch, M., "Femtosecond laser spectroscopy for exploration of space" in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade (2023):115-115,
https://hdl.handle.net/21.15107/rcub_vinar_11815 .

TY  - JOUR
AU  - Kepić, Dejan P.
AU  - Kleut, Duška
AU  - Marković, Zoran M.
AU  - Bajuk-Bogdanović, Danica V.
AU  - Pavlović, Vladimir B.
AU  - Krmpot, Aleksandar
AU  - Lekić, Marina
AU  - Jovanović, Dragana J.
AU  - Todorović-Marković, Biljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9568
AB  - Graphene is an excellent material to anchor metal nanoparticles due to its large surface area. In this paper, we report the use of electrochemically exfoliated graphene as support to anchor gold nanoparticles (Au NPs). Au NPs are synthesized via the reduction of chloroauric acid under gamma irradiation at low doses of 1, 5, and 10 kGy and directly deposited onto the graphene surface, making this procedure simple and fast. Good water dispersibility of exfoliated graphene, due to the presence of oxygen-containing functional groups in the structure of graphene, provides long-term stability of Au NPs - graphene composite dispersions. The majority of the Au NPs obtained by this method have sizes of up to 40 nm, while the increase in the applied dose leads to an increase in the amount of smaller nanoparticles. The increase of temperature of the prepared composite material upon irradiation with an 808 nm continuous wave laser was monitored. All samples show a temperature increase between 21.5 and 25.6 °C for 10 min of the laser exposure, which indicates that Au NPs - graphene composite can effectively be used in photothermal treatment for cancer therapy. © 2021 Elsevier Inc.
T2  - Materials Characterization
T1  - One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications
VL  - 173
SP  - 110944
DO  - 10.1016/j.matchar.2021.110944
ER  - 

@article{
author = "Kepić, Dejan P. and Kleut, Duška and Marković, Zoran M. and Bajuk-Bogdanović, Danica V. and Pavlović, Vladimir B. and Krmpot, Aleksandar and Lekić, Marina and Jovanović, Dragana J. and Todorović-Marković, Biljana",
year = "2021",
abstract = "Graphene is an excellent material to anchor metal nanoparticles due to its large surface area. In this paper, we report the use of electrochemically exfoliated graphene as support to anchor gold nanoparticles (Au NPs). Au NPs are synthesized via the reduction of chloroauric acid under gamma irradiation at low doses of 1, 5, and 10 kGy and directly deposited onto the graphene surface, making this procedure simple and fast. Good water dispersibility of exfoliated graphene, due to the presence of oxygen-containing functional groups in the structure of graphene, provides long-term stability of Au NPs - graphene composite dispersions. The majority of the Au NPs obtained by this method have sizes of up to 40 nm, while the increase in the applied dose leads to an increase in the amount of smaller nanoparticles. The increase of temperature of the prepared composite material upon irradiation with an 808 nm continuous wave laser was monitored. All samples show a temperature increase between 21.5 and 25.6 °C for 10 min of the laser exposure, which indicates that Au NPs - graphene composite can effectively be used in photothermal treatment for cancer therapy. © 2021 Elsevier Inc.",
journal = "Materials Characterization",
title = "One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications",
volume = "173",
pages = "110944",
doi = "10.1016/j.matchar.2021.110944"
}

Kepić, D. P., Kleut, D., Marković, Z. M., Bajuk-Bogdanović, D. V., Pavlović, V. B., Krmpot, A., Lekić, M., Jovanović, D. J.,& Todorović-Marković, B.. (2021). One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications. in Materials Characterization, 173, 110944.
https://doi.org/10.1016/j.matchar.2021.110944

Kepić DP, Kleut D, Marković ZM, Bajuk-Bogdanović DV, Pavlović VB, Krmpot A, Lekić M, Jovanović DJ, Todorović-Marković B. One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications. in Materials Characterization. 2021;173:110944.
doi:10.1016/j.matchar.2021.110944 .

Kepić, Dejan P., Kleut, Duška, Marković, Zoran M., Bajuk-Bogdanović, Danica V., Pavlović, Vladimir B., Krmpot, Aleksandar, Lekić, Marina, Jovanović, Dragana J., Todorović-Marković, Biljana, "One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications" in Materials Characterization, 173 (2021):110944,
https://doi.org/10.1016/j.matchar.2021.110944 . .

TY  - JOUR
AU  - Pan, Rui
AU  - Zapolnova, Ekaterina
AU  - Golz, Torsten
AU  - Krmpot, Aleksandar J.
AU  - Rabasović, Mihailo D.
AU  - Petrović, Jovana S.
AU  - Asgekar, Vivek
AU  - Faatz, Bart
AU  - Tavella, Franz
AU  - Perucchi, Andrea
AU  - Kovalev, Sergey
AU  - Green, Bertram Windisch
AU  - Geloni, Gianluca
AU  - Tanikawa, Takanori
AU  - Yurkov, Mikhail
AU  - Schneidmiller, Evgeny
AU  - Gensch, Michael
AU  - Stojanović, Nikola
PY  - 2019
UR  - http://scripts.iucr.org/cgi-bin/paper?S1600577519003412
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8197
AB  - The THz beamline at FLASH, DESY, provides both tunable (1–300 THz) narrow-bandwidth (∼10%) and broad-bandwidth intense (up to 150 uJ) THz pulses delivered in 1 MHz bursts and naturally synchronized with free-electron laser X-ray pulses. Combination of these pulses, along with the auxiliary NIR and VIS ultrashort lasers, supports a plethora of dynamic investigations in physics, material science and biology. The unique features of the FLASH THz pulses and the accelerator source, however, bring along a set of challenges in the diagnostics of their key parameters: pulse energy, spectral, temporal and spatial profiles. Here, these challenges are discussed and the pulse diagnostic tools developed at FLASH are presented. In particular, a radiometric power measurement is presented that enables the derivation of the average pulse energy within a pulse burst across the spectral range, jitter-corrected electro-optical sampling for the full spectro-temporal pulse characterization, spatial beam profiling along the beam transport line and at the sample, and a lamellar grating based Fourier transform infrared spectrometer for the on-line assessment of the average THz pulse spectra. Corresponding measurement results provide a comprehensive insight into the THz beamline capabilities.
T2  - Journal of Synchrotron Radiation
T1  - Photon diagnostics at the FLASH THz beamline
VL  - 26
IS  - 3
SP  - 700
EP  - 707
DO  - 10.1107/S1600577519003412
ER  - 

@article{
author = "Pan, Rui and Zapolnova, Ekaterina and Golz, Torsten and Krmpot, Aleksandar J. and Rabasović, Mihailo D. and Petrović, Jovana S. and Asgekar, Vivek and Faatz, Bart and Tavella, Franz and Perucchi, Andrea and Kovalev, Sergey and Green, Bertram Windisch and Geloni, Gianluca and Tanikawa, Takanori and Yurkov, Mikhail and Schneidmiller, Evgeny and Gensch, Michael and Stojanović, Nikola",
year = "2019",
abstract = "The THz beamline at FLASH, DESY, provides both tunable (1–300 THz) narrow-bandwidth (∼10%) and broad-bandwidth intense (up to 150 uJ) THz pulses delivered in 1 MHz bursts and naturally synchronized with free-electron laser X-ray pulses. Combination of these pulses, along with the auxiliary NIR and VIS ultrashort lasers, supports a plethora of dynamic investigations in physics, material science and biology. The unique features of the FLASH THz pulses and the accelerator source, however, bring along a set of challenges in the diagnostics of their key parameters: pulse energy, spectral, temporal and spatial profiles. Here, these challenges are discussed and the pulse diagnostic tools developed at FLASH are presented. In particular, a radiometric power measurement is presented that enables the derivation of the average pulse energy within a pulse burst across the spectral range, jitter-corrected electro-optical sampling for the full spectro-temporal pulse characterization, spatial beam profiling along the beam transport line and at the sample, and a lamellar grating based Fourier transform infrared spectrometer for the on-line assessment of the average THz pulse spectra. Corresponding measurement results provide a comprehensive insight into the THz beamline capabilities.",
journal = "Journal of Synchrotron Radiation",
title = "Photon diagnostics at the FLASH THz beamline",
volume = "26",
number = "3",
pages = "700-707",
doi = "10.1107/S1600577519003412"
}

Pan, R., Zapolnova, E., Golz, T., Krmpot, A. J., Rabasović, M. D., Petrović, J. S., Asgekar, V., Faatz, B., Tavella, F., Perucchi, A., Kovalev, S., Green, B. W., Geloni, G., Tanikawa, T., Yurkov, M., Schneidmiller, E., Gensch, M.,& Stojanović, N.. (2019). Photon diagnostics at the FLASH THz beamline. in Journal of Synchrotron Radiation, 26(3), 700-707.
https://doi.org/10.1107/S1600577519003412

Pan R, Zapolnova E, Golz T, Krmpot AJ, Rabasović MD, Petrović JS, Asgekar V, Faatz B, Tavella F, Perucchi A, Kovalev S, Green BW, Geloni G, Tanikawa T, Yurkov M, Schneidmiller E, Gensch M, Stojanović N. Photon diagnostics at the FLASH THz beamline. in Journal of Synchrotron Radiation. 2019;26(3):700-707.
doi:10.1107/S1600577519003412 .

Pan, Rui, Zapolnova, Ekaterina, Golz, Torsten, Krmpot, Aleksandar J., Rabasović, Mihailo D., Petrović, Jovana S., Asgekar, Vivek, Faatz, Bart, Tavella, Franz, Perucchi, Andrea, Kovalev, Sergey, Green, Bertram Windisch, Geloni, Gianluca, Tanikawa, Takanori, Yurkov, Mikhail, Schneidmiller, Evgeny, Gensch, Michael, Stojanović, Nikola, "Photon diagnostics at the FLASH THz beamline" in Journal of Synchrotron Radiation, 26, no. 3 (2019):700-707,
https://doi.org/10.1107/S1600577519003412 . .

TY  - CONF
AU  - Pan, R.
AU  - Zapolnova, E.
AU  - Golz, T.
AU  - Rabasovic, M.
AU  - Krmpot, A.
AU  - Petrović, Jovana
AU  - Gensch, M.
AU  - Stojanović, N.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11883
AB  - THz sources at FLASH utilize spent electron beam from a soft X-ray FEL to generate very intense (up to 150µJ), tunable frequency (1-300THz) and ultrafast narrowband (~10%) THz pulses, which are naturally synchronized to soft X-ray pulses [1]. This unique combination allows for wide range of element specific pump-probe experiments in physics, material science and biology. Here we discuss the unique features of the FLASH THz pulses and the accelerator source that bring along a set of challenges in the diagnostics of their key parameters: pulse energy, spectral, temporal and spatial profiles.
PB  - Belgrade : Vinča Institute of Nuclear Sciences, University of Belgrade
C3  - PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts
T1  - Ultrafast High-Field THz beamline at X-ray FEL
SP  - 156
EP  - 156
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11883
ER  - 

@conference{
author = "Pan, R. and Zapolnova, E. and Golz, T. and Rabasovic, M. and Krmpot, A. and Petrović, Jovana and Gensch, M. and Stojanović, N.",
year = "2019",
abstract = "THz sources at FLASH utilize spent electron beam from a soft X-ray FEL to generate very intense (up to 150µJ), tunable frequency (1-300THz) and ultrafast narrowband (~10%) THz pulses, which are naturally synchronized to soft X-ray pulses [1]. This unique combination allows for wide range of element specific pump-probe experiments in physics, material science and biology. Here we discuss the unique features of the FLASH THz pulses and the accelerator source that bring along a set of challenges in the diagnostics of their key parameters: pulse energy, spectral, temporal and spatial profiles.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences, University of Belgrade",
journal = "PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts",
title = "Ultrafast High-Field THz beamline at X-ray FEL",
pages = "156-156",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11883"
}

Pan, R., Zapolnova, E., Golz, T., Rabasovic, M., Krmpot, A., Petrović, J., Gensch, M.,& Stojanović, N.. (2019). Ultrafast High-Field THz beamline at X-ray FEL. in PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts
Belgrade : Vinča Institute of Nuclear Sciences, University of Belgrade., 156-156.
https://hdl.handle.net/21.15107/rcub_vinar_11883

Pan R, Zapolnova E, Golz T, Rabasovic M, Krmpot A, Petrović J, Gensch M, Stojanović N. Ultrafast High-Field THz beamline at X-ray FEL. in PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts. 2019;:156-156.
https://hdl.handle.net/21.15107/rcub_vinar_11883 .

Pan, R., Zapolnova, E., Golz, T., Rabasovic, M., Krmpot, A., Petrović, Jovana, Gensch, M., Stojanović, N., "Ultrafast High-Field THz beamline at X-ray FEL" in PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts (2019):156-156,
https://hdl.handle.net/21.15107/rcub_vinar_11883 .

TY  - CONF
AU  - Zapolnova, E.
AU  - Golz, T.
AU  - Pan, R.
AU  - Vladković, A.
AU  - Rabasović, M.
AU  - Krmpot, A.
AU  - Petrović, J.
AU  - Stojanović, N.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10943
AB  - 4 th generation X-ray light sources have attracted enormous attention of scientists from various fields, allowing conducting pump-probe experiments, which can reveal the mechanisms of chemical reactions and processes, occurring on the molecular and atomic level and on the time-scale of few femtoseconds. FLASH (Free Electron Laser in Hamburg) has a world-wide unique ability to generate tunable, broadband, high-field THz pulses, which are synchronized with XUV pulses on the order of few femtoseconds [1, 2]. It opens the door to new exiting THz pump X-ray probe experiments, such as THz driven magnetization and ion dynamics, coherent spin control, etc. For such experiments it’s extremely important to know the properties of the radiation, which is delivered to the experiment; therefore suitable tools for characterization are required. We are presenting a custom made ultra-broadband FTIR Spectrometer (Fourier Transform Infrared), optimised for THz source at FLASH and a 2D beam-profiler, both optimized to detect high-field, broadband THz radiation (0.6 µm to 600 um) and which are used as a part of the THz characterization tool, developed at THz beamline at FLASH. THz characterization tool also includes the Electro-optic Sampling (EOS) set up and Spectral Decoding (EOSD) set up, developed together in collaboration with the Institute of Physics and Vinca Institute of Nuclear Sciences in Belgrade, Serbia. We will also present the experiments, which have been conducted in THz beamline during last couple of years to give an overview on the exiting opportunities for light-matter interaction experiments with such an intense and broadband THz source.
PB  - Belgrade : Institute of Physics Belgrade
C3  - PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts
T1  - Tunable High- field THz source at FLASH: Spectral and spatial characterization.
SP  - 167
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10943
ER  - 

@conference{
author = "Zapolnova, E. and Golz, T. and Pan, R. and Vladković, A. and Rabasović, M. and Krmpot, A. and Petrović, J. and Stojanović, N.",
year = "2017",
abstract = "4 th generation X-ray light sources have attracted enormous attention of scientists from various fields, allowing conducting pump-probe experiments, which can reveal the mechanisms of chemical reactions and processes, occurring on the molecular and atomic level and on the time-scale of few femtoseconds. FLASH (Free Electron Laser in Hamburg) has a world-wide unique ability to generate tunable, broadband, high-field THz pulses, which are synchronized with XUV pulses on the order of few femtoseconds [1, 2]. It opens the door to new exiting THz pump X-ray probe experiments, such as THz driven magnetization and ion dynamics, coherent spin control, etc. For such experiments it’s extremely important to know the properties of the radiation, which is delivered to the experiment; therefore suitable tools for characterization are required. We are presenting a custom made ultra-broadband FTIR Spectrometer (Fourier Transform Infrared), optimised for THz source at FLASH and a 2D beam-profiler, both optimized to detect high-field, broadband THz radiation (0.6 µm to 600 um) and which are used as a part of the THz characterization tool, developed at THz beamline at FLASH. THz characterization tool also includes the Electro-optic Sampling (EOS) set up and Spectral Decoding (EOSD) set up, developed together in collaboration with the Institute of Physics and Vinca Institute of Nuclear Sciences in Belgrade, Serbia. We will also present the experiments, which have been conducted in THz beamline during last couple of years to give an overview on the exiting opportunities for light-matter interaction experiments with such an intense and broadband THz source.",
publisher = "Belgrade : Institute of Physics Belgrade",
journal = "PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts",
title = "Tunable High- field THz source at FLASH: Spectral and spatial characterization.",
pages = "167",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10943"
}

Zapolnova, E., Golz, T., Pan, R., Vladković, A., Rabasović, M., Krmpot, A., Petrović, J.,& Stojanović, N.. (2017). Tunable High- field THz source at FLASH: Spectral and spatial characterization.. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts
Belgrade : Institute of Physics Belgrade., 167.
https://hdl.handle.net/21.15107/rcub_vinar_10943

Zapolnova E, Golz T, Pan R, Vladković A, Rabasović M, Krmpot A, Petrović J, Stojanović N. Tunable High- field THz source at FLASH: Spectral and spatial characterization.. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts. 2017;:167.
https://hdl.handle.net/21.15107/rcub_vinar_10943 .

Zapolnova, E., Golz, T., Pan, R., Vladković, A., Rabasović, M., Krmpot, A., Petrović, J., Stojanović, N., "Tunable High- field THz source at FLASH: Spectral and spatial characterization." in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts (2017):167,
https://hdl.handle.net/21.15107/rcub_vinar_10943 .

TY  - CONF
AU  - Pan, R.
AU  - Zapolnova, E.
AU  - Golz, T.
AU  - Rabasović, M.
AU  - Krmpot, A.
AU  - Vladković, A.
AU  - Petrović, J.
AU  - Stojanović, N.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10942
AB  - High-field THz radiation is a fascinating tool to study the interaction of electromagnetic waves with matter, such as demagnetization dynamics [1], tracking the ultrafast motion of a signal molecule [2], resonant control of states of matter [3] and et al. THz beamline at FLASH1 provides both tunable narrow bandwidth (1-30THz) and broad bandwidth intense THz pulses for user's experiment. Recently we have developed a THz characterization tool, optimized for FLASH's THz spectral range. It is based on THz electro-optic (EO) sampling, in combination of EO spectral decoding for THz pulse arrival timing jitter correction. It enables characterization of THz pulse, as a statistical average used in the experiment, with high temporal and spectral resolution. Because of the highly fluctuating nature of the THz generation process at FLASH, for certain class of experiments, knowledge of the individual THz pulse properties is essential. Thus a fast diagnostic of THz parameters is required and single-shot method offers clear advantages. The EO spectral decoding subsystem in the THz pulse characterization tool can be used as independent setup at performing single-shot measurements. However, due to the frequency interference in a long chirped laser pulse, the measured THz temporal profile is almost always distorted [4], particularly when characterizing ultra-broadband THz pulses with realistic probing laser. In order to study this single-shot technique, the broad bandwidth THz dump radiation is measured by EO spectral decoding setup. The distortion is analyzed in details and the measured profiles show agreement with our calculations. The measurements can help us to study possible retrieval strategies of the original THz electric field from the distorted measured one. This as a final goal has a single shot characterization of THz pulses for FLASH user experiments.
PB  - Belgrade : Institute of Physics Belgrade
C3  - PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts
T1  - En route: single-shot THz characterization technique for THz beamline at FLASH1
SP  - 166
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10942
ER  - 

@conference{
author = "Pan, R. and Zapolnova, E. and Golz, T. and Rabasović, M. and Krmpot, A. and Vladković, A. and Petrović, J. and Stojanović, N.",
year = "2017",
abstract = "High-field THz radiation is a fascinating tool to study the interaction of electromagnetic waves with matter, such as demagnetization dynamics [1], tracking the ultrafast motion of a signal molecule [2], resonant control of states of matter [3] and et al. THz beamline at FLASH1 provides both tunable narrow bandwidth (1-30THz) and broad bandwidth intense THz pulses for user's experiment. Recently we have developed a THz characterization tool, optimized for FLASH's THz spectral range. It is based on THz electro-optic (EO) sampling, in combination of EO spectral decoding for THz pulse arrival timing jitter correction. It enables characterization of THz pulse, as a statistical average used in the experiment, with high temporal and spectral resolution. Because of the highly fluctuating nature of the THz generation process at FLASH, for certain class of experiments, knowledge of the individual THz pulse properties is essential. Thus a fast diagnostic of THz parameters is required and single-shot method offers clear advantages. The EO spectral decoding subsystem in the THz pulse characterization tool can be used as independent setup at performing single-shot measurements. However, due to the frequency interference in a long chirped laser pulse, the measured THz temporal profile is almost always distorted [4], particularly when characterizing ultra-broadband THz pulses with realistic probing laser. In order to study this single-shot technique, the broad bandwidth THz dump radiation is measured by EO spectral decoding setup. The distortion is analyzed in details and the measured profiles show agreement with our calculations. The measurements can help us to study possible retrieval strategies of the original THz electric field from the distorted measured one. This as a final goal has a single shot characterization of THz pulses for FLASH user experiments.",
publisher = "Belgrade : Institute of Physics Belgrade",
journal = "PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts",
title = "En route: single-shot THz characterization technique for THz beamline at FLASH1",
pages = "166",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10942"
}

Pan, R., Zapolnova, E., Golz, T., Rabasović, M., Krmpot, A., Vladković, A., Petrović, J.,& Stojanović, N.. (2017). En route: single-shot THz characterization technique for THz beamline at FLASH1. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts
Belgrade : Institute of Physics Belgrade., 166.
https://hdl.handle.net/21.15107/rcub_vinar_10942

Pan R, Zapolnova E, Golz T, Rabasović M, Krmpot A, Vladković A, Petrović J, Stojanović N. En route: single-shot THz characterization technique for THz beamline at FLASH1. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts. 2017;:166.
https://hdl.handle.net/21.15107/rcub_vinar_10942 .

Pan, R., Zapolnova, E., Golz, T., Rabasović, M., Krmpot, A., Vladković, A., Petrović, J., Stojanović, N., "En route: single-shot THz characterization technique for THz beamline at FLASH1" in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts (2017):166,
https://hdl.handle.net/21.15107/rcub_vinar_10942 .

TY  - JOUR
AU  - Gaković, Biljana M.
AU  - Petrović, Suzana
AU  - Krmpot, Aleksandar J.
AU  - Pantelić, Dejan
AU  - Jelenković, Branislav
AU  - Stratakis, Emmanuel
AU  - Fotakis, C.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/228
AB  - In this work we reported low and high repetition frequency femtosecond laser- induced modifications of tungsten-based thin film. The tungsten-titanium (WTi) thin film, thickness of 190 nm, was deposited by sputtering on single crystal Si (100) wafer. Irradiations were performed in air by linearly polarized and focused femtosecond laser beams with following parameters: (1) pulse duration 160 fs, wavelength 800 nm, laser repetition frequency (LRF) 75 MHz - high LRF, and (2) duration 40 fs, wavelength 800 nm, LRF of 1 kHz - low LRF. The results of femtosecond lasers processing of the WTi thin film revealed laser induced periodical surface structures (LIPSS) in the case of low LRF regime. LIPSSs were formed with different periodicity and different orientation to the laser polarization at the surface: micro-scale LIPSSs with orientation perpendicular to the laser polarization and nano-scale LIPSSs parallel and perpendicular to the laser polarization. After processing of the WTi/Si system in high LRF regime ablation and nanoparticles formation were registered.
T2  - Laser and Particle Beams
T1  - Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film
VL  - 32
IS  - 4
SP  - 613
EP  - 619
DO  - 10.1017/S0263034614000627
ER  - 

@article{
author = "Gaković, Biljana M. and Petrović, Suzana and Krmpot, Aleksandar J. and Pantelić, Dejan and Jelenković, Branislav and Stratakis, Emmanuel and Fotakis, C.",
year = "2014",
abstract = "In this work we reported low and high repetition frequency femtosecond laser- induced modifications of tungsten-based thin film. The tungsten-titanium (WTi) thin film, thickness of 190 nm, was deposited by sputtering on single crystal Si (100) wafer. Irradiations were performed in air by linearly polarized and focused femtosecond laser beams with following parameters: (1) pulse duration 160 fs, wavelength 800 nm, laser repetition frequency (LRF) 75 MHz - high LRF, and (2) duration 40 fs, wavelength 800 nm, LRF of 1 kHz - low LRF. The results of femtosecond lasers processing of the WTi thin film revealed laser induced periodical surface structures (LIPSS) in the case of low LRF regime. LIPSSs were formed with different periodicity and different orientation to the laser polarization at the surface: micro-scale LIPSSs with orientation perpendicular to the laser polarization and nano-scale LIPSSs parallel and perpendicular to the laser polarization. After processing of the WTi/Si system in high LRF regime ablation and nanoparticles formation were registered.",
journal = "Laser and Particle Beams",
title = "Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film",
volume = "32",
number = "4",
pages = "613-619",
doi = "10.1017/S0263034614000627"
}

Gaković, B. M., Petrović, S., Krmpot, A. J., Pantelić, D., Jelenković, B., Stratakis, E.,& Fotakis, C.. (2014). Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film. in Laser and Particle Beams, 32(4), 613-619.
https://doi.org/10.1017/S0263034614000627

Gaković BM, Petrović S, Krmpot AJ, Pantelić D, Jelenković B, Stratakis E, Fotakis C. Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film. in Laser and Particle Beams. 2014;32(4):613-619.
doi:10.1017/S0263034614000627 .

Gaković, Biljana M., Petrović, Suzana, Krmpot, Aleksandar J., Pantelić, Dejan, Jelenković, Branislav, Stratakis, Emmanuel, Fotakis, C., "Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film" in Laser and Particle Beams, 32, no. 4 (2014):613-619,
https://doi.org/10.1017/S0263034614000627 . .

TY  - JOUR
AU  - Gaković, Biljana M.
AU  - Stašić, Jelena
AU  - Petrović, Suzana
AU  - Radak, Bojan
AU  - Krmpot, Aleksandar J.
AU  - Jelenković, Branislav
AU  - Trtica, Milan
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6844
AB  - Interaction of pulsed femtosecond Ti:sapphire laser (160 fs), operating at high repetition rate (75 MHz) at 800 nm, with nickel-based superalloy Inconel 600 and tungsten-titanium (WTi) target was studied. The WTi target was in form of thin film deposited on silicon substrate. Low laser fluence of maximum 50 mJ/cm(2) had modified the target surface during irradiation/exposure time of seconds or minutes. The radiation absorbed from the laser beam generates at the surface a series of effects, such as direct material vaporization, formation of clusters, etc. Morphological features of the targets can be summarized as: (a) intensive removal of material and crater appearance; (b) creation of nanostructures; (c) microcracking, etc. Ablation of Inconel 600 surface is effective, resulting in formation of holes with small diameter ( LT = 10 mu m) and relatively large depth ( LT = 50 mu m). In case of WTi target/thin film, the surrounding rim is not so expressed, and crater depths are lower. It can be concluded that the average laser power of the order of watts, pulse energies of the order of nanojoules and high repetition rates (MHz range) can successfully modify metallic materials.
T2  - Acta Physica Polonica A
T1  - Surface Modification of Metallic Targets with Ultrashort Laser Pulses
VL  - 116
IS  - 4
SP  - 611
EP  - 613
DO  - 10.12693/APhysPolA.116.611
ER  - 

@article{
author = "Gaković, Biljana M. and Stašić, Jelena and Petrović, Suzana and Radak, Bojan and Krmpot, Aleksandar J. and Jelenković, Branislav and Trtica, Milan",
year = "2009",
abstract = "Interaction of pulsed femtosecond Ti:sapphire laser (160 fs), operating at high repetition rate (75 MHz) at 800 nm, with nickel-based superalloy Inconel 600 and tungsten-titanium (WTi) target was studied. The WTi target was in form of thin film deposited on silicon substrate. Low laser fluence of maximum 50 mJ/cm(2) had modified the target surface during irradiation/exposure time of seconds or minutes. The radiation absorbed from the laser beam generates at the surface a series of effects, such as direct material vaporization, formation of clusters, etc. Morphological features of the targets can be summarized as: (a) intensive removal of material and crater appearance; (b) creation of nanostructures; (c) microcracking, etc. Ablation of Inconel 600 surface is effective, resulting in formation of holes with small diameter ( LT = 10 mu m) and relatively large depth ( LT = 50 mu m). In case of WTi target/thin film, the surrounding rim is not so expressed, and crater depths are lower. It can be concluded that the average laser power of the order of watts, pulse energies of the order of nanojoules and high repetition rates (MHz range) can successfully modify metallic materials.",
journal = "Acta Physica Polonica A",
title = "Surface Modification of Metallic Targets with Ultrashort Laser Pulses",
volume = "116",
number = "4",
pages = "611-613",
doi = "10.12693/APhysPolA.116.611"
}

Gaković, B. M., Stašić, J., Petrović, S., Radak, B., Krmpot, A. J., Jelenković, B.,& Trtica, M.. (2009). Surface Modification of Metallic Targets with Ultrashort Laser Pulses. in Acta Physica Polonica A, 116(4), 611-613.
https://doi.org/10.12693/APhysPolA.116.611

Gaković BM, Stašić J, Petrović S, Radak B, Krmpot AJ, Jelenković B, Trtica M. Surface Modification of Metallic Targets with Ultrashort Laser Pulses. in Acta Physica Polonica A. 2009;116(4):611-613.
doi:10.12693/APhysPolA.116.611 .

Gaković, Biljana M., Stašić, Jelena, Petrović, Suzana, Radak, Bojan, Krmpot, Aleksandar J., Jelenković, Branislav, Trtica, Milan, "Surface Modification of Metallic Targets with Ultrashort Laser Pulses" in Acta Physica Polonica A, 116, no. 4 (2009):611-613,
https://doi.org/10.12693/APhysPolA.116.611 . .

TY  - JOUR
AU  - Stašić, Jelena
AU  - Gaković, Biljana M.
AU  - Krmpot, Aleksandar J.
AU  - Pavlović, Vladimir B.
AU  - Trtica, Milan
AU  - Jelenković, Branislav
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3857
AB  - The interaction of Ti:sapphire laser, operating at high repetition rate of 75 MHz, with nickel-based super-alloy Inconel 600 was studied. The laser was emitting at 800 nm and ultrashort pulse duration was 160 fs. Nickel-based super-alloy surface modification was studied in a low laser energy/fluence regime of maximum 20 nJ-15 mJ/cm(2), for short (10 s) and long irradiation times (range of minutes). Surface damage threshold of this material was estimated to be 1.46 nJ, i.e., 0.001 J/cm(2) in air. The radiation absorbed from Ti:sapphire laser beam under these conditions generates at the surface a series of effects. such as direct material vaporization, plasma creation, formation of nano-structures and their larger aggregates, damage accumulation, etc. Laser induced surface morphological changes observed on Inconel 600 were: (1) intensive removal Of Surface material with crater like features; (2) material deposition at near and farther periphery and creation of nano-aggregates/nano-structures; (3) sporadic micro-cracking of the inner and outer damage area. Generally. features created on nickel-based super-alloy surface by high repetition rate femtosecond pulses are characterized by low inner/outer damage diameter of less than 11 mu m/30 mu m and relatively large depth on the order of 150 mu m, in both low (10 s) and high (minutes) irradiation time regimes.
T2  - Laser and Particle Beams
T1  - Nickel-based super-alloy Inconel 600 morphological modifications by high repetition rate femtosecond Ti:sapphire laser
VL  - 27
IS  - 4
SP  - 699
EP  - 707
DO  - 10.1017/S0263034609990425
ER  - 

@article{
author = "Stašić, Jelena and Gaković, Biljana M. and Krmpot, Aleksandar J. and Pavlović, Vladimir B. and Trtica, Milan and Jelenković, Branislav",
year = "2009",
abstract = "The interaction of Ti:sapphire laser, operating at high repetition rate of 75 MHz, with nickel-based super-alloy Inconel 600 was studied. The laser was emitting at 800 nm and ultrashort pulse duration was 160 fs. Nickel-based super-alloy surface modification was studied in a low laser energy/fluence regime of maximum 20 nJ-15 mJ/cm(2), for short (10 s) and long irradiation times (range of minutes). Surface damage threshold of this material was estimated to be 1.46 nJ, i.e., 0.001 J/cm(2) in air. The radiation absorbed from Ti:sapphire laser beam under these conditions generates at the surface a series of effects. such as direct material vaporization, plasma creation, formation of nano-structures and their larger aggregates, damage accumulation, etc. Laser induced surface morphological changes observed on Inconel 600 were: (1) intensive removal Of Surface material with crater like features; (2) material deposition at near and farther periphery and creation of nano-aggregates/nano-structures; (3) sporadic micro-cracking of the inner and outer damage area. Generally. features created on nickel-based super-alloy surface by high repetition rate femtosecond pulses are characterized by low inner/outer damage diameter of less than 11 mu m/30 mu m and relatively large depth on the order of 150 mu m, in both low (10 s) and high (minutes) irradiation time regimes.",
journal = "Laser and Particle Beams",
title = "Nickel-based super-alloy Inconel 600 morphological modifications by high repetition rate femtosecond Ti:sapphire laser",
volume = "27",
number = "4",
pages = "699-707",
doi = "10.1017/S0263034609990425"
}

Stašić, J., Gaković, B. M., Krmpot, A. J., Pavlović, V. B., Trtica, M.,& Jelenković, B.. (2009). Nickel-based super-alloy Inconel 600 morphological modifications by high repetition rate femtosecond Ti:sapphire laser. in Laser and Particle Beams, 27(4), 699-707.
https://doi.org/10.1017/S0263034609990425

Stašić J, Gaković BM, Krmpot AJ, Pavlović VB, Trtica M, Jelenković B. Nickel-based super-alloy Inconel 600 morphological modifications by high repetition rate femtosecond Ti:sapphire laser. in Laser and Particle Beams. 2009;27(4):699-707.
doi:10.1017/S0263034609990425 .

Stašić, Jelena, Gaković, Biljana M., Krmpot, Aleksandar J., Pavlović, Vladimir B., Trtica, Milan, Jelenković, Branislav, "Nickel-based super-alloy Inconel 600 morphological modifications by high repetition rate femtosecond Ti:sapphire laser" in Laser and Particle Beams, 27, no. 4 (2009):699-707,
https://doi.org/10.1017/S0263034609990425 . .