TY  - JOUR
AU  - Radosavljević, Ana
AU  - Gligorić, Goran
AU  - Beličev, Petra
AU  - Maluckov, Aleksandra
AU  - Stepić, Milutin
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1658
AB  - By introducing evolving disorder in the binary kagome ribbons, we study the establishment of diffusive spreading of flat band states characterized by diffractionless propagation in regular periodic ribbons. Our numerical analysis relies on controlling strength and rate of change of disorder during light propagation while tailoring binarism of the kagome ribbons in order to isolate the flat band with the gap from the rest of the ribbons eigenvalue spectrum and study systematically its influence on diffusion. We show that the flat band plays a dominant role in the establishment of the diffusion for a given strength and rate of change of disorder, whereas the rest of the ribbons eigenvalue spectrum induces only quantitative differences in the light spreading regimes. Due to the universality of studied phenomena, our findings may be of interest in various disordered physical systems with flat spectral bands, ranging from photonics to ultracold matter systems and plasmonics.
T2  - Physical Review E
T1  - Light propagation in binary kagome ribbons with evolving disorder
VL  - 96
IS  - 1
DO  - 10.1103/PhysRevE.96.012225
ER  - 

@article{
author = "Radosavljević, Ana and Gligorić, Goran and Beličev, Petra and Maluckov, Aleksandra and Stepić, Milutin",
year = "2017",
abstract = "By introducing evolving disorder in the binary kagome ribbons, we study the establishment of diffusive spreading of flat band states characterized by diffractionless propagation in regular periodic ribbons. Our numerical analysis relies on controlling strength and rate of change of disorder during light propagation while tailoring binarism of the kagome ribbons in order to isolate the flat band with the gap from the rest of the ribbons eigenvalue spectrum and study systematically its influence on diffusion. We show that the flat band plays a dominant role in the establishment of the diffusion for a given strength and rate of change of disorder, whereas the rest of the ribbons eigenvalue spectrum induces only quantitative differences in the light spreading regimes. Due to the universality of studied phenomena, our findings may be of interest in various disordered physical systems with flat spectral bands, ranging from photonics to ultracold matter systems and plasmonics.",
journal = "Physical Review E",
title = "Light propagation in binary kagome ribbons with evolving disorder",
volume = "96",
number = "1",
doi = "10.1103/PhysRevE.96.012225"
}

Radosavljević, A., Gligorić, G., Beličev, P., Maluckov, A.,& Stepić, M.. (2017). Light propagation in binary kagome ribbons with evolving disorder. in Physical Review E, 96(1).
https://doi.org/10.1103/PhysRevE.96.012225

Radosavljević A, Gligorić G, Beličev P, Maluckov A, Stepić M. Light propagation in binary kagome ribbons with evolving disorder. in Physical Review E. 2017;96(1).
doi:10.1103/PhysRevE.96.012225 .

Radosavljević, Ana, Gligorić, Goran, Beličev, Petra, Maluckov, Aleksandra, Stepić, Milutin, "Light propagation in binary kagome ribbons with evolving disorder" in Physical Review E, 96, no. 1 (2017),
https://doi.org/10.1103/PhysRevE.96.012225 . .

TY  - JOUR
AU  - Gligorić, Goran
AU  - Radosavljević, Ana
AU  - Petrović, Jovana S.
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
AU  - Malomed, Boris A.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1848
AB  - We address the stability and dynamics of eigenmodes in linearly shaped strings (dimers, trimers, tetramers, and pentamers) built of droplets in a binary Bose-Einstein condensate (BEC). The binary BEC is composed of atoms in two pseudo-spin states with attractive interactions, dressed by properly arranged laser fields, which induce the (pseudo-) spin-orbit (SO) coupling. We demonstrate that the SO-coupling terms help to create eigenmodes of particular types in the strings. Dimer, trimer, and pentamer eigenmodes of the linear system, which correspond to the zero eigenvalue (EV, alias chemical potential) extend into the nonlinear ones, keeping an exact analytical form, while tetramers do not admit such a continuation, because the respective spectrum does not contain a zero EV. Stability areas of these modes shrink with the increasing nonlinearity. Besides these modes, other types of nonlinear states, which are produced by the continuation of their linear counterparts corresponding to some nonzero EVs, are found in a numerical form (including ones for the tetramer system). They are stable in nearly entire existence regions in trimer and pentamer systems, but only in a very small area for the tetramers. Similar results are also obtained, but not displayed in detail, for hexa-and septamers.
T2  - Chaos
T1  - Models of spin-orbit-coupled oligomers
VL  - 27
IS  - 11
DO  - 10.1063/1.5000345
ER  - 

@article{
author = "Gligorić, Goran and Radosavljević, Ana and Petrović, Jovana S. and Maluckov, Aleksandra and Hadžievski, Ljupčo and Malomed, Boris A.",
year = "2017",
abstract = "We address the stability and dynamics of eigenmodes in linearly shaped strings (dimers, trimers, tetramers, and pentamers) built of droplets in a binary Bose-Einstein condensate (BEC). The binary BEC is composed of atoms in two pseudo-spin states with attractive interactions, dressed by properly arranged laser fields, which induce the (pseudo-) spin-orbit (SO) coupling. We demonstrate that the SO-coupling terms help to create eigenmodes of particular types in the strings. Dimer, trimer, and pentamer eigenmodes of the linear system, which correspond to the zero eigenvalue (EV, alias chemical potential) extend into the nonlinear ones, keeping an exact analytical form, while tetramers do not admit such a continuation, because the respective spectrum does not contain a zero EV. Stability areas of these modes shrink with the increasing nonlinearity. Besides these modes, other types of nonlinear states, which are produced by the continuation of their linear counterparts corresponding to some nonzero EVs, are found in a numerical form (including ones for the tetramer system). They are stable in nearly entire existence regions in trimer and pentamer systems, but only in a very small area for the tetramers. Similar results are also obtained, but not displayed in detail, for hexa-and septamers.",
journal = "Chaos",
title = "Models of spin-orbit-coupled oligomers",
volume = "27",
number = "11",
doi = "10.1063/1.5000345"
}

Gligorić, G., Radosavljević, A., Petrović, J. S., Maluckov, A., Hadžievski, L.,& Malomed, B. A.. (2017). Models of spin-orbit-coupled oligomers. in Chaos, 27(11).
https://doi.org/10.1063/1.5000345

Gligorić G, Radosavljević A, Petrović JS, Maluckov A, Hadžievski L, Malomed BA. Models of spin-orbit-coupled oligomers. in Chaos. 2017;27(11).
doi:10.1063/1.5000345 .

Gligorić, Goran, Radosavljević, Ana, Petrović, Jovana S., Maluckov, Aleksandra, Hadžievski, Ljupčo, Malomed, Boris A., "Models of spin-orbit-coupled oligomers" in Chaos, 27, no. 11 (2017),
https://doi.org/10.1063/1.5000345 . .

TY  - CONF
AU  - Beličev, Petra
AU  - Gligorić, Goran
AU  - Radosavljević, Ana
AU  - Maluckov, Aleksandra
AU  - Stepić, Milutin
AU  - Poblete, Rodrigo Andres Vicencio
AU  - Johansson, Magnus M.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10954
AB  - One of the attractive two-dimensional [2D] lattice configurations is characterized by kagome geometry. The specific arrangement of its elements, i.e. waveguides, in the form of periodic hexagons renders completely flat the first energy band in linear case. As a consequence, the localized ring-like eigenmodes belonging to the lowest energy state propagate without diffraction through the system [1, 2]. Here we study kagome ribbon [3], which can be interpreted as one-dimensional counterpart of the standard 2D kagome lattice, and can be fabricated by dint of the direct femtosecond laser inscription [4, 5]. The existence, stability and dynamical properties of various localized modes in binary kagome ribbon with defocusing Kerr type of nonlinearity have been explored, both numerically and analytically. We derived the corresponding dispersion relation and the bandgap spectrum, confirmed the opening of mini-gaps in it and found several types of stable ring-like modes to exist: staggered, unstaggered and vortex. Beside these nonlinear mode configurations occurring in a semi-infinite gap, we investigated features of "hourglass" solutions, identified in [3] as interesting structures when kagome lattice dimensionality is reduced to 1D. In nonlinear binary kagome ribbon dynamically stable propagation of unstaggered rings, vortex modes with certain topological charge and hourglass solutions are observed, while the staggered ring solutions are destabilized. In addition, we examined possibility to generate stable propagating solitary modes inside the first mini-gap and found that these mode patterns localize within sites mutually coupled by smaller coupling constant. The last feature is opposite to the nonlinear localized solutions found in the semi-infinite gap.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade
T1  - On localized modes in nonlinear binary kagome ribbons
SP  - 68
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10954
ER  - 

@conference{
author = "Beličev, Petra and Gligorić, Goran and Radosavljević, Ana and Maluckov, Aleksandra and Stepić, Milutin and Poblete, Rodrigo Andres Vicencio and Johansson, Magnus M.",
year = "2015",
abstract = "One of the attractive two-dimensional [2D] lattice configurations is characterized by kagome geometry. The specific arrangement of its elements, i.e. waveguides, in the form of periodic hexagons renders completely flat the first energy band in linear case. As a consequence, the localized ring-like eigenmodes belonging to the lowest energy state propagate without diffraction through the system [1, 2]. Here we study kagome ribbon [3], which can be interpreted as one-dimensional counterpart of the standard 2D kagome lattice, and can be fabricated by dint of the direct femtosecond laser inscription [4, 5]. The existence, stability and dynamical properties of various localized modes in binary kagome ribbon with defocusing Kerr type of nonlinearity have been explored, both numerically and analytically. We derived the corresponding dispersion relation and the bandgap spectrum, confirmed the opening of mini-gaps in it and found several types of stable ring-like modes to exist: staggered, unstaggered and vortex. Beside these nonlinear mode configurations occurring in a semi-infinite gap, we investigated features of "hourglass" solutions, identified in [3] as interesting structures when kagome lattice dimensionality is reduced to 1D. In nonlinear binary kagome ribbon dynamically stable propagation of unstaggered rings, vortex modes with certain topological charge and hourglass solutions are observed, while the staggered ring solutions are destabilized. In addition, we examined possibility to generate stable propagating solitary modes inside the first mini-gap and found that these mode patterns localize within sites mutually coupled by smaller coupling constant. The last feature is opposite to the nonlinear localized solutions found in the semi-infinite gap.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade",
title = "On localized modes in nonlinear binary kagome ribbons",
pages = "68",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10954"
}

Beličev, P., Gligorić, G., Radosavljević, A., Maluckov, A., Stepić, M., Poblete, R. A. V.,& Johansson, M. M.. (2015). On localized modes in nonlinear binary kagome ribbons. in PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 68.
https://hdl.handle.net/21.15107/rcub_vinar_10954

Beličev P, Gligorić G, Radosavljević A, Maluckov A, Stepić M, Poblete RAV, Johansson MM. On localized modes in nonlinear binary kagome ribbons. in PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade. 2015;:68.
https://hdl.handle.net/21.15107/rcub_vinar_10954 .

Beličev, Petra, Gligorić, Goran, Radosavljević, Ana, Maluckov, Aleksandra, Stepić, Milutin, Poblete, Rodrigo Andres Vicencio, Johansson, Magnus M., "On localized modes in nonlinear binary kagome ribbons" in PHOTONICA2015 : 5th International School and Conference on Photonics and COST actions: MP1204, BM1205 and MP1205 : book of abstracts; August 24-28, 2015; Belgrade (2015):68,
https://hdl.handle.net/21.15107/rcub_vinar_10954 .

TY  - JOUR
AU  - Radosavljević, Ana
AU  - Radovanović, Jelena V.
AU  - Milanović, Vitomir B.
AU  - Indjin, Dragan
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/470
AB  - We propose a method which delivers optimal cubic GaN/AlGaN quantum well profiles such that both the Stark effect and peak intersubband absorption from the ground to the first excited electronic state, in a prescribed range of bias electric fields, are maximized. Our method relies on the Genetic Algorithm which finds globally optimal structures with a predefined number of embedded layers. We investigate simple rectangular quantum wells with embedded step layers for applications in tunable mid-infrared photodetectors. The effects of band nonparabolicity are taken into account to refine our model.
T2  - Optical and Quantum Electronics
T1  - Cubic GaN/AlGaN based quantum wells optimized for applications to tunable mid-infrared photodetectors
VL  - 47
IS  - 4
SP  - 865
EP  - 872
DO  - 10.1007/s11082-014-0016-y
ER  - 

@article{
author = "Radosavljević, Ana and Radovanović, Jelena V. and Milanović, Vitomir B. and Indjin, Dragan",
year = "2015",
abstract = "We propose a method which delivers optimal cubic GaN/AlGaN quantum well profiles such that both the Stark effect and peak intersubband absorption from the ground to the first excited electronic state, in a prescribed range of bias electric fields, are maximized. Our method relies on the Genetic Algorithm which finds globally optimal structures with a predefined number of embedded layers. We investigate simple rectangular quantum wells with embedded step layers for applications in tunable mid-infrared photodetectors. The effects of band nonparabolicity are taken into account to refine our model.",
journal = "Optical and Quantum Electronics",
title = "Cubic GaN/AlGaN based quantum wells optimized for applications to tunable mid-infrared photodetectors",
volume = "47",
number = "4",
pages = "865-872",
doi = "10.1007/s11082-014-0016-y"
}

Radosavljević, A., Radovanović, J. V., Milanović, V. B.,& Indjin, D.. (2015). Cubic GaN/AlGaN based quantum wells optimized for applications to tunable mid-infrared photodetectors. in Optical and Quantum Electronics, 47(4), 865-872.
https://doi.org/10.1007/s11082-014-0016-y

Radosavljević A, Radovanović JV, Milanović VB, Indjin D. Cubic GaN/AlGaN based quantum wells optimized for applications to tunable mid-infrared photodetectors. in Optical and Quantum Electronics. 2015;47(4):865-872.
doi:10.1007/s11082-014-0016-y .

Radosavljević, Ana, Radovanović, Jelena V., Milanović, Vitomir B., Indjin, Dragan, "Cubic GaN/AlGaN based quantum wells optimized for applications to tunable mid-infrared photodetectors" in Optical and Quantum Electronics, 47, no. 4 (2015):865-872,
https://doi.org/10.1007/s11082-014-0016-y . .

TY  - CONF
AU  - Radosavljević, Ana
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Stepić, Milutin
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7106
AB  - Here, an overview of the main results for light propagation and control over it in composite complex photonic lattices based on photorefractive materials is presented.
T1  - Light Propagation Management in Complex Photonic Lattices
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7106
ER  - 

@conference{
author = "Radosavljević, Ana and Gligorić, Goran and Maluckov, Aleksandra and Stepić, Milutin",
year = "2015",
abstract = "Here, an overview of the main results for light propagation and control over it in composite complex photonic lattices based on photorefractive materials is presented.",
title = "Light Propagation Management in Complex Photonic Lattices",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7106"
}

Radosavljević, A., Gligorić, G., Maluckov, A.,& Stepić, M.. (2015). Light Propagation Management in Complex Photonic Lattices. .
https://hdl.handle.net/21.15107/rcub_vinar_7106

Radosavljević A, Gligorić G, Maluckov A, Stepić M. Light Propagation Management in Complex Photonic Lattices. 2015;.
https://hdl.handle.net/21.15107/rcub_vinar_7106 .

Radosavljević, Ana, Gligorić, Goran, Maluckov, Aleksandra, Stepić, Milutin, "Light Propagation Management in Complex Photonic Lattices" (2015),
https://hdl.handle.net/21.15107/rcub_vinar_7106 .

TY  - JOUR
AU  - Beličev, Petra
AU  - Gligorić, Goran
AU  - Radosavljević, Ana
AU  - Maluckov, Aleksandra
AU  - Stepić, Milutin
AU  - Poblete, Rodrigo Andres Vicencio
AU  - Johansson, Magnus M.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/838
AB  - The localized mode propagation in binary nonlinear kagome ribbons is investigated with the premise to ensure controlled light propagation through photonic lattice media. Particularity of the linear system characterized by the dispersionless flat band in the spectrum is the opening of new minigaps due to the binarism. Together with the presence of nonlinearity, this determines the guiding mode types and properties. Nonlinearity destabilizes the staggered rings found to be nondiffracting in the linear system, but can give rise to dynamically stable ringlike solutions of several types: unstaggered rings, low-power staggered rings, hour-glass-like solutions, and vortex rings with high power. The type of solutions, i.e., the energy and angular momentum circulation through the nonlinear lattice, can be controlled by suitable initial excitation of the ribbon. In addition, by controlling the system binarism various localized modes can be generated and guided through the system, owing to the opening of the minigaps in the spectrum. All these findings offer diverse technical possibilities, especially with respect to the high-speed optical communications and high-power lasers.
PB  - American Physical Society
T2  - Physical Review E
T1  - Localized modes in nonlinear binary kagome ribbons
VL  - 92
IS  - 5
DO  - 10.1103/PhysRevE.92.052916
ER  - 

@article{
author = "Beličev, Petra and Gligorić, Goran and Radosavljević, Ana and Maluckov, Aleksandra and Stepić, Milutin and Poblete, Rodrigo Andres Vicencio and Johansson, Magnus M.",
year = "2015",
abstract = "The localized mode propagation in binary nonlinear kagome ribbons is investigated with the premise to ensure controlled light propagation through photonic lattice media. Particularity of the linear system characterized by the dispersionless flat band in the spectrum is the opening of new minigaps due to the binarism. Together with the presence of nonlinearity, this determines the guiding mode types and properties. Nonlinearity destabilizes the staggered rings found to be nondiffracting in the linear system, but can give rise to dynamically stable ringlike solutions of several types: unstaggered rings, low-power staggered rings, hour-glass-like solutions, and vortex rings with high power. The type of solutions, i.e., the energy and angular momentum circulation through the nonlinear lattice, can be controlled by suitable initial excitation of the ribbon. In addition, by controlling the system binarism various localized modes can be generated and guided through the system, owing to the opening of the minigaps in the spectrum. All these findings offer diverse technical possibilities, especially with respect to the high-speed optical communications and high-power lasers.",
publisher = "American Physical Society",
journal = "Physical Review E",
title = "Localized modes in nonlinear binary kagome ribbons",
volume = "92",
number = "5",
doi = "10.1103/PhysRevE.92.052916"
}

Beličev, P., Gligorić, G., Radosavljević, A., Maluckov, A., Stepić, M., Poblete, R. A. V.,& Johansson, M. M.. (2015). Localized modes in nonlinear binary kagome ribbons. in Physical Review E
American Physical Society., 92(5).
https://doi.org/10.1103/PhysRevE.92.052916

Beličev P, Gligorić G, Radosavljević A, Maluckov A, Stepić M, Poblete RAV, Johansson MM. Localized modes in nonlinear binary kagome ribbons. in Physical Review E. 2015;92(5).
doi:10.1103/PhysRevE.92.052916 .

Beličev, Petra, Gligorić, Goran, Radosavljević, Ana, Maluckov, Aleksandra, Stepić, Milutin, Poblete, Rodrigo Andres Vicencio, Johansson, Magnus M., "Localized modes in nonlinear binary kagome ribbons" in Physical Review E, 92, no. 5 (2015),
https://doi.org/10.1103/PhysRevE.92.052916 . .

TY  - JOUR
AU  - Radosavljević, Ana
AU  - Daničić, Aleksandar
AU  - Petrović, Jovana S.
AU  - Maluckov, Aleksandra
AU  - Hadžievski, Ljupčo
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/872
AB  - Multicore fibers with linearly coupled cores are considered as a means of the coherent transport needed for high-capacity communication systems and high-power fiber lasers. The conditions of the existence and stability of coherent light propagation in multicore fibers with circularly arranged cores are derived. The multicore fiber is modeled by the linear discrete complex Ginzburg-Landau equation, while its eigenvalues are found analytically. The inverse eigenvalue problem proposing the commensurability of eigenvalues is solved to find the intercore coupling coefficients that support periodic revivals of the input state. Both planar modes and vortices are considered. Effects of the central core and material loss/gain on eigenvalue commensurability conditions and mode dynamics are studied in detail. (C) 2015 Optical Society of America
T2  - Journal of the Optical Society of America. B: Optical Physics
T1  - Coherent light propagation through multicore optical fibers with linearly coupled cores
VL  - 32
IS  - 12
SP  - 2520
EP  - 2527
DO  - 10.1364/JOSAB.32.002520
ER  - 

@article{
author = "Radosavljević, Ana and Daničić, Aleksandar and Petrović, Jovana S. and Maluckov, Aleksandra and Hadžievski, Ljupčo",
year = "2015",
abstract = "Multicore fibers with linearly coupled cores are considered as a means of the coherent transport needed for high-capacity communication systems and high-power fiber lasers. The conditions of the existence and stability of coherent light propagation in multicore fibers with circularly arranged cores are derived. The multicore fiber is modeled by the linear discrete complex Ginzburg-Landau equation, while its eigenvalues are found analytically. The inverse eigenvalue problem proposing the commensurability of eigenvalues is solved to find the intercore coupling coefficients that support periodic revivals of the input state. Both planar modes and vortices are considered. Effects of the central core and material loss/gain on eigenvalue commensurability conditions and mode dynamics are studied in detail. (C) 2015 Optical Society of America",
journal = "Journal of the Optical Society of America. B: Optical Physics",
title = "Coherent light propagation through multicore optical fibers with linearly coupled cores",
volume = "32",
number = "12",
pages = "2520-2527",
doi = "10.1364/JOSAB.32.002520"
}

Radosavljević, A., Daničić, A., Petrović, J. S., Maluckov, A.,& Hadžievski, L.. (2015). Coherent light propagation through multicore optical fibers with linearly coupled cores. in Journal of the Optical Society of America. B: Optical Physics, 32(12), 2520-2527.
https://doi.org/10.1364/JOSAB.32.002520

Radosavljević A, Daničić A, Petrović JS, Maluckov A, Hadžievski L. Coherent light propagation through multicore optical fibers with linearly coupled cores. in Journal of the Optical Society of America. B: Optical Physics. 2015;32(12):2520-2527.
doi:10.1364/JOSAB.32.002520 .

Radosavljević, Ana, Daničić, Aleksandar, Petrović, Jovana S., Maluckov, Aleksandra, Hadžievski, Ljupčo, "Coherent light propagation through multicore optical fibers with linearly coupled cores" in Journal of the Optical Society of America. B: Optical Physics, 32, no. 12 (2015):2520-2527,
https://doi.org/10.1364/JOSAB.32.002520 . .

TY  - JOUR
AU  - Kuzmanović, Slavica
AU  - Stojanović Krasić, Marija
AU  - Milović, Daniela M.
AU  - Miletić, Miodrag B.
AU  - Radosavljević, Ana
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Stepić, Milutin
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/727
AB  - Light propagation through composite photonic lattice containing a cavity bounded by the interface between two structurally different linear lattices and on-site nonlinear defect in one of them is investigated numerically. We find conditions under which dynamically stable bounded cavity modes can exist. We observe various cavity localized modes such as: single-hump, multi-hump, and moving breathing modes. Light propagation obstructions are phenomenologically related to the Fano resonances. Presented numerical findings may lead to interesting applications, such as blocking, filtering, and transporting of light beams through the optical medium.
T2  - European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics
T1  - Light propagation inside cavity formed between nonlinear defect and interface of two dissimilar one-dimensional linear photonic lattices
VL  - 69
IS  - 9
DO  - 10.1140/epjd/e2015-60243-0
ER  - 

@article{
author = "Kuzmanović, Slavica and Stojanović Krasić, Marija and Milović, Daniela M. and Miletić, Miodrag B. and Radosavljević, Ana and Gligorić, Goran and Maluckov, Aleksandra and Stepić, Milutin",
year = "2015",
abstract = "Light propagation through composite photonic lattice containing a cavity bounded by the interface between two structurally different linear lattices and on-site nonlinear defect in one of them is investigated numerically. We find conditions under which dynamically stable bounded cavity modes can exist. We observe various cavity localized modes such as: single-hump, multi-hump, and moving breathing modes. Light propagation obstructions are phenomenologically related to the Fano resonances. Presented numerical findings may lead to interesting applications, such as blocking, filtering, and transporting of light beams through the optical medium.",
journal = "European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics",
title = "Light propagation inside cavity formed between nonlinear defect and interface of two dissimilar one-dimensional linear photonic lattices",
volume = "69",
number = "9",
doi = "10.1140/epjd/e2015-60243-0"
}

Kuzmanović, S., Stojanović Krasić, M., Milović, D. M., Miletić, M. B., Radosavljević, A., Gligorić, G., Maluckov, A.,& Stepić, M.. (2015). Light propagation inside cavity formed between nonlinear defect and interface of two dissimilar one-dimensional linear photonic lattices. in European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics, 69(9).
https://doi.org/10.1140/epjd/e2015-60243-0

Kuzmanović S, Stojanović Krasić M, Milović DM, Miletić MB, Radosavljević A, Gligorić G, Maluckov A, Stepić M. Light propagation inside cavity formed between nonlinear defect and interface of two dissimilar one-dimensional linear photonic lattices. in European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics. 2015;69(9).
doi:10.1140/epjd/e2015-60243-0 .

Kuzmanović, Slavica, Stojanović Krasić, Marija, Milović, Daniela M., Miletić, Miodrag B., Radosavljević, Ana, Gligorić, Goran, Maluckov, Aleksandra, Stepić, Milutin, "Light propagation inside cavity formed between nonlinear defect and interface of two dissimilar one-dimensional linear photonic lattices" in European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics, 69, no. 9 (2015),
https://doi.org/10.1140/epjd/e2015-60243-0 . .

TY  - JOUR
AU  - Kuzmanović, Slavica
AU  - Stojanović Krasić, Marija
AU  - Milović, Daniela M.
AU  - Radosavljević, Ana
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Stepić, Milutin
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/394
AB  - We study numerically light beam propagation across uniform, linear, one-dimensional photonic lattice possessing one nonlinear defect. Depending on the strength of nonlinear defect, input beam position and phase shift, different dynamical regimes have been identified. We distinguish input parameters set for which a regime of light propagation blockade by the nonlinear defect appears. Obtained results may be useful for all-optical control of transmission of waves in interferometry.
T2  - Physica Scripta
T1  - Defect induced wave-packet dynamics in linear one-dimensional photonic lattices
VL  - 90
IS  - 2
DO  - 10.1088/0031-8949/90/2/025505
ER  - 

@article{
author = "Kuzmanović, Slavica and Stojanović Krasić, Marija and Milović, Daniela M. and Radosavljević, Ana and Gligorić, Goran and Maluckov, Aleksandra and Stepić, Milutin",
year = "2015",
abstract = "We study numerically light beam propagation across uniform, linear, one-dimensional photonic lattice possessing one nonlinear defect. Depending on the strength of nonlinear defect, input beam position and phase shift, different dynamical regimes have been identified. We distinguish input parameters set for which a regime of light propagation blockade by the nonlinear defect appears. Obtained results may be useful for all-optical control of transmission of waves in interferometry.",
journal = "Physica Scripta",
title = "Defect induced wave-packet dynamics in linear one-dimensional photonic lattices",
volume = "90",
number = "2",
doi = "10.1088/0031-8949/90/2/025505"
}

Kuzmanović, S., Stojanović Krasić, M., Milović, D. M., Radosavljević, A., Gligorić, G., Maluckov, A.,& Stepić, M.. (2015). Defect induced wave-packet dynamics in linear one-dimensional photonic lattices. in Physica Scripta, 90(2).
https://doi.org/10.1088/0031-8949/90/2/025505

Kuzmanović S, Stojanović Krasić M, Milović DM, Radosavljević A, Gligorić G, Maluckov A, Stepić M. Defect induced wave-packet dynamics in linear one-dimensional photonic lattices. in Physica Scripta. 2015;90(2).
doi:10.1088/0031-8949/90/2/025505 .

Kuzmanović, Slavica, Stojanović Krasić, Marija, Milović, Daniela M., Radosavljević, Ana, Gligorić, Goran, Maluckov, Aleksandra, Stepić, Milutin, "Defect induced wave-packet dynamics in linear one-dimensional photonic lattices" in Physica Scripta, 90, no. 2 (2015),
https://doi.org/10.1088/0031-8949/90/2/025505 . .

TY  - JOUR
AU  - Radosavljević, Ana
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Stepić, Milutin
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/238
AB  - We use Bloch oscillations to demonstrate potential light beam propagation control in photonic lattices with linear refractive index change in transverse direction. It is qualitatively investigated how composite photonic lattice systems with varied values of refractive index gradient and nonlinearity strength along the propagation direction can be used to perform different functions, such as beam splitting and switching, in future components of all-optical networks. Additionally, we demonstrate the robustness of Bloch oscillations to nonlinearity and disorder in the proposed setup. (C) 2014 Elsevier B.V. All rights resented.
T2  - Optics Communications
T1  - Manipulation of light beam propagation in one-dimensional photonic lattices with linear refractive index profile
VL  - 335
SP  - 194
EP  - 198
DO  - 10.1016/j.optcom.2014.09.035
ER  - 

@article{
author = "Radosavljević, Ana and Gligorić, Goran and Maluckov, Aleksandra and Stepić, Milutin",
year = "2015",
abstract = "We use Bloch oscillations to demonstrate potential light beam propagation control in photonic lattices with linear refractive index change in transverse direction. It is qualitatively investigated how composite photonic lattice systems with varied values of refractive index gradient and nonlinearity strength along the propagation direction can be used to perform different functions, such as beam splitting and switching, in future components of all-optical networks. Additionally, we demonstrate the robustness of Bloch oscillations to nonlinearity and disorder in the proposed setup. (C) 2014 Elsevier B.V. All rights resented.",
journal = "Optics Communications",
title = "Manipulation of light beam propagation in one-dimensional photonic lattices with linear refractive index profile",
volume = "335",
pages = "194-198",
doi = "10.1016/j.optcom.2014.09.035"
}

Radosavljević, A., Gligorić, G., Maluckov, A.,& Stepić, M.. (2015). Manipulation of light beam propagation in one-dimensional photonic lattices with linear refractive index profile. in Optics Communications, 335, 194-198.
https://doi.org/10.1016/j.optcom.2014.09.035

Radosavljević A, Gligorić G, Maluckov A, Stepić M. Manipulation of light beam propagation in one-dimensional photonic lattices with linear refractive index profile. in Optics Communications. 2015;335:194-198.
doi:10.1016/j.optcom.2014.09.035 .

Radosavljević, Ana, Gligorić, Goran, Maluckov, Aleksandra, Stepić, Milutin, "Manipulation of light beam propagation in one-dimensional photonic lattices with linear refractive index profile" in Optics Communications, 335 (2015):194-198,
https://doi.org/10.1016/j.optcom.2014.09.035 . .

TY  - JOUR
AU  - Radosavljević, Ana
AU  - Radovanović, Jelena V.
AU  - Milanović, Vitomir B.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5891
AB  - A method is proposed for the optimization of structural parameters of GaN/AlGaN quantum wells and Bragg-confined structures, with respect to peak intersubband absorption from the ground to the first excited electronic state in the mid and near infrared spectral range. It is based on the application of the Genetic Algorithm and delivers globally optimal structures with a preset number of embedded layers. Simple rectangular quantum well profile is investigated for the maximal Stark effect and applications to tunable mid-infrared photodetectors. In case of Bragg-confined structures, an above the barrier bound state is used to extend the range of transition energies above the values available in conventional quantum wells. The effects of band nonparabolicity are taken into account. (C) 2013 Elsevier Ltd. All rights reserved
T2  - Solid State Communications
T1  - Optimization of cubic GaN/AlGaN quantum well-based structures for intersubband absorption in the infrared spectral range
VL  - 182
SP  - 38
EP  - 42
DO  - 10.1016/j.ssc.2013.12.006
ER  - 

@article{
author = "Radosavljević, Ana and Radovanović, Jelena V. and Milanović, Vitomir B.",
year = "2014",
abstract = "A method is proposed for the optimization of structural parameters of GaN/AlGaN quantum wells and Bragg-confined structures, with respect to peak intersubband absorption from the ground to the first excited electronic state in the mid and near infrared spectral range. It is based on the application of the Genetic Algorithm and delivers globally optimal structures with a preset number of embedded layers. Simple rectangular quantum well profile is investigated for the maximal Stark effect and applications to tunable mid-infrared photodetectors. In case of Bragg-confined structures, an above the barrier bound state is used to extend the range of transition energies above the values available in conventional quantum wells. The effects of band nonparabolicity are taken into account. (C) 2013 Elsevier Ltd. All rights reserved",
journal = "Solid State Communications",
title = "Optimization of cubic GaN/AlGaN quantum well-based structures for intersubband absorption in the infrared spectral range",
volume = "182",
pages = "38-42",
doi = "10.1016/j.ssc.2013.12.006"
}

Radosavljević, A., Radovanović, J. V.,& Milanović, V. B.. (2014). Optimization of cubic GaN/AlGaN quantum well-based structures for intersubband absorption in the infrared spectral range. in Solid State Communications, 182, 38-42.
https://doi.org/10.1016/j.ssc.2013.12.006

Radosavljević A, Radovanović JV, Milanović VB. Optimization of cubic GaN/AlGaN quantum well-based structures for intersubband absorption in the infrared spectral range. in Solid State Communications. 2014;182:38-42.
doi:10.1016/j.ssc.2013.12.006 .

Radosavljević, Ana, Radovanović, Jelena V., Milanović, Vitomir B., "Optimization of cubic GaN/AlGaN quantum well-based structures for intersubband absorption in the infrared spectral range" in Solid State Communications, 182 (2014):38-42,
https://doi.org/10.1016/j.ssc.2013.12.006 . .

TY  - JOUR
AU  - Radosavljević, Ana
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Stepić, Milutin
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5874
AB  - We investigate light localization in quasi-periodic nonlinear photonic lattices (PLs) composed of two periodic component lattices of equal lattice potential strength and incommensurate spatial periods. By including the system parameters from the experimentally realizable setup, we confirm that the light localization is a threshold determined phenomenon in a limit of negligible nonlinearity. In addition, we show that self-trapping can affect the localized light in the established setup only in the presence of strong nonlinearity. Guided by these findings we consider the possibility of governing light propagation by proposing a composite lattice system comprising alternating quasi-periodic parts with different potential depths and nonlinearity strengths.
T2  - Journal of Optics
T1  - Control of light propagation in one-dimensional quasi-periodic nonlinear photonic lattices
VL  - 16
IS  - 2
DO  - 10.1088/2040-8978/16/2/025201
ER  - 

@article{
author = "Radosavljević, Ana and Gligorić, Goran and Maluckov, Aleksandra and Stepić, Milutin",
year = "2014",
abstract = "We investigate light localization in quasi-periodic nonlinear photonic lattices (PLs) composed of two periodic component lattices of equal lattice potential strength and incommensurate spatial periods. By including the system parameters from the experimentally realizable setup, we confirm that the light localization is a threshold determined phenomenon in a limit of negligible nonlinearity. In addition, we show that self-trapping can affect the localized light in the established setup only in the presence of strong nonlinearity. Guided by these findings we consider the possibility of governing light propagation by proposing a composite lattice system comprising alternating quasi-periodic parts with different potential depths and nonlinearity strengths.",
journal = "Journal of Optics",
title = "Control of light propagation in one-dimensional quasi-periodic nonlinear photonic lattices",
volume = "16",
number = "2",
doi = "10.1088/2040-8978/16/2/025201"
}

Radosavljević, A., Gligorić, G., Maluckov, A.,& Stepić, M.. (2014). Control of light propagation in one-dimensional quasi-periodic nonlinear photonic lattices. in Journal of Optics, 16(2).
https://doi.org/10.1088/2040-8978/16/2/025201

Radosavljević A, Gligorić G, Maluckov A, Stepić M. Control of light propagation in one-dimensional quasi-periodic nonlinear photonic lattices. in Journal of Optics. 2014;16(2).
doi:10.1088/2040-8978/16/2/025201 .

Radosavljević, Ana, Gligorić, Goran, Maluckov, Aleksandra, Stepić, Milutin, "Control of light propagation in one-dimensional quasi-periodic nonlinear photonic lattices" in Journal of Optics, 16, no. 2 (2014),
https://doi.org/10.1088/2040-8978/16/2/025201 . .

TY  - JOUR
AU  - Radosavljević, Ana
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Stepić, Milutin
AU  - Milović, Daniela M.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5617
AB  - We study managing of light beam propagation by competing disorder and nonlinearity in one-dimensional disordered, nonlinear photonic lattices (PLs). The system is modeled by a paraxial time-independent Helmholtz equation, which includes the nonlinear saturable self-interacting term and the quenched or nonquenched disordered PL potential. Diverse PL structures with alternating length of the regular and disordered parts are investigated showing the possibility to change the light propagation from ballistic to the propagation of the transversely localized structures originating from the Anderson-like localization or self-trapping mechanism. Dynamical calculations indicate the possibility of guiding light through the lattice by proper lattice management. (C) 2013 Optical Society of America
T2  - Journal of the Optical Society of America. B: Optical Physics
T1  - Light propagation management by disorder and nonlinearity in one-dimensional photonic lattices
VL  - 30
IS  - 8
SP  - 2340
EP  - 2347
DO  - 10.1364/JOSAB.30.002340
ER  - 

@article{
author = "Radosavljević, Ana and Gligorić, Goran and Maluckov, Aleksandra and Stepić, Milutin and Milović, Daniela M.",
year = "2013",
abstract = "We study managing of light beam propagation by competing disorder and nonlinearity in one-dimensional disordered, nonlinear photonic lattices (PLs). The system is modeled by a paraxial time-independent Helmholtz equation, which includes the nonlinear saturable self-interacting term and the quenched or nonquenched disordered PL potential. Diverse PL structures with alternating length of the regular and disordered parts are investigated showing the possibility to change the light propagation from ballistic to the propagation of the transversely localized structures originating from the Anderson-like localization or self-trapping mechanism. Dynamical calculations indicate the possibility of guiding light through the lattice by proper lattice management. (C) 2013 Optical Society of America",
journal = "Journal of the Optical Society of America. B: Optical Physics",
title = "Light propagation management by disorder and nonlinearity in one-dimensional photonic lattices",
volume = "30",
number = "8",
pages = "2340-2347",
doi = "10.1364/JOSAB.30.002340"
}

Radosavljević, A., Gligorić, G., Maluckov, A., Stepić, M.,& Milović, D. M.. (2013). Light propagation management by disorder and nonlinearity in one-dimensional photonic lattices. in Journal of the Optical Society of America. B: Optical Physics, 30(8), 2340-2347.
https://doi.org/10.1364/JOSAB.30.002340

Radosavljević A, Gligorić G, Maluckov A, Stepić M, Milović DM. Light propagation management by disorder and nonlinearity in one-dimensional photonic lattices. in Journal of the Optical Society of America. B: Optical Physics. 2013;30(8):2340-2347.
doi:10.1364/JOSAB.30.002340 .

Radosavljević, Ana, Gligorić, Goran, Maluckov, Aleksandra, Stepić, Milutin, Milović, Daniela M., "Light propagation management by disorder and nonlinearity in one-dimensional photonic lattices" in Journal of the Optical Society of America. B: Optical Physics, 30, no. 8 (2013):2340-2347,
https://doi.org/10.1364/JOSAB.30.002340 . .