TY  - JOUR
AU  - Markushev, Dragan D.
AU  - Rabasović, Mihailo D.
AU  - Todorović, D. M.
AU  - Galović, Slobodanka
AU  - Bialkowski, S. E.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/488
AB  - Methods for photoacoustic signal measurement, rectification, and analysis for 85 mu m thin Si samples in the 20-20 000 Hz modulation frequency range are presented. Methods for frequency-dependent amplitude and phase signal rectification in the presence of coherent and incoherent noise as well as distortion due to microphone characteristics are presented. Signal correction is accomplished using inverse system response functions deduced by comparing real to ideal signals for a sample with well-known bulk parameters and dimensions. The system response is a piece-wise construction, each component being due to a particular effect of the measurement system. Heat transfer and elastic effects are modeled using standard Rosencweig-Gersho and elastic-bending theories. Thermal diffusion, thermoelastic, and plasmaelastic signal components are calculated and compared to measurements. The differences between theory and experiment are used to detect and correct signal distortion and to determine detector and sound-card characteristics. Corrected signal analysis is found to faithfully reflect known sample parameters. (C) 2015 AIP Publishing LLC.
T2  - Review of Scientific Instruments
T1  - Photoacoustic signal and noise analysis for Si thin plate: Signal correction in frequency domain
VL  - 86
IS  - 3
DO  - 10.1063/1.4914894
ER  - 

@article{
author = "Markushev, Dragan D. and Rabasović, Mihailo D. and Todorović, D. M. and Galović, Slobodanka and Bialkowski, S. E.",
year = "2015",
abstract = "Methods for photoacoustic signal measurement, rectification, and analysis for 85 mu m thin Si samples in the 20-20 000 Hz modulation frequency range are presented. Methods for frequency-dependent amplitude and phase signal rectification in the presence of coherent and incoherent noise as well as distortion due to microphone characteristics are presented. Signal correction is accomplished using inverse system response functions deduced by comparing real to ideal signals for a sample with well-known bulk parameters and dimensions. The system response is a piece-wise construction, each component being due to a particular effect of the measurement system. Heat transfer and elastic effects are modeled using standard Rosencweig-Gersho and elastic-bending theories. Thermal diffusion, thermoelastic, and plasmaelastic signal components are calculated and compared to measurements. The differences between theory and experiment are used to detect and correct signal distortion and to determine detector and sound-card characteristics. Corrected signal analysis is found to faithfully reflect known sample parameters. (C) 2015 AIP Publishing LLC.",
journal = "Review of Scientific Instruments",
title = "Photoacoustic signal and noise analysis for Si thin plate: Signal correction in frequency domain",
volume = "86",
number = "3",
doi = "10.1063/1.4914894"
}

Markushev, D. D., Rabasović, M. D., Todorović, D. M., Galović, S.,& Bialkowski, S. E.. (2015). Photoacoustic signal and noise analysis for Si thin plate: Signal correction in frequency domain. in Review of Scientific Instruments, 86(3).
https://doi.org/10.1063/1.4914894

Markushev DD, Rabasović MD, Todorović DM, Galović S, Bialkowski SE. Photoacoustic signal and noise analysis for Si thin plate: Signal correction in frequency domain. in Review of Scientific Instruments. 2015;86(3).
doi:10.1063/1.4914894 .

Markushev, Dragan D., Rabasović, Mihailo D., Todorović, D. M., Galović, Slobodanka, Bialkowski, S. E., "Photoacoustic signal and noise analysis for Si thin plate: Signal correction in frequency domain" in Review of Scientific Instruments, 86, no. 3 (2015),
https://doi.org/10.1063/1.4914894 . .

TY  - JOUR
AU  - Markushev, Dragan D.
AU  - Ordonez-Miranda, Jose
AU  - Rabasović, Mihailo D.
AU  - Galović, Slobodanka
AU  - Todorović, D. M.
AU  - Bialkowski, S. E.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/645
AB  - The open-cell photoacoustic signal measured in the transmission configuration for aluminum thin plates with thicknesses of 280 mu m, 197 mu m, and 112 mu m is experimentally and theoretically analyzed, in the 20 Hz-7 kHz modulation frequency range. It is shown that the observed differences between the predictions of the standard thermoelastic model and the experiment data of both the amplitude and phase of the photoacoustic signal can be overcome by considering the aluminum samples coated with a thin layer of black paint as volume-absorber materials. This new approach provides a quite good agreement with the obtained experimental data, in the whole frequency range, and yields an effective absorption coefficient of (16 +/- 2) mm(-1), for a 280 mu m-thick sample. The introduction of the finite absorption coefficient led to the correct ratio between the thermal diffusion and thermoelastic components of the photoacoustic signal. Furthermore, it is found that the volume-absorber approach accurately describes the behavior of the amplitude, but not that of the phase recorded for a 112 mu m-thick sample, due to its relatively strong thermoelastic bending, which is not considered by this theory. Within the approximation of the small bending, the proposed volume-absorber model provides a reliable description of the photoacoustic signal for Al samples thicker than 112 mu m, and extends the applicability of the classical opaque approach. (C) 2015 AIP Publishing LLC.
T2  - Journal of Applied Physics
T1  - Effect of the absorption coefficient of aluminium plates on their thermoelastic bending in photoacoustic experiments
VL  - 117
IS  - 24
DO  - 10.1063/1.4922718
ER  - 

@article{
author = "Markushev, Dragan D. and Ordonez-Miranda, Jose and Rabasović, Mihailo D. and Galović, Slobodanka and Todorović, D. M. and Bialkowski, S. E.",
year = "2015",
abstract = "The open-cell photoacoustic signal measured in the transmission configuration for aluminum thin plates with thicknesses of 280 mu m, 197 mu m, and 112 mu m is experimentally and theoretically analyzed, in the 20 Hz-7 kHz modulation frequency range. It is shown that the observed differences between the predictions of the standard thermoelastic model and the experiment data of both the amplitude and phase of the photoacoustic signal can be overcome by considering the aluminum samples coated with a thin layer of black paint as volume-absorber materials. This new approach provides a quite good agreement with the obtained experimental data, in the whole frequency range, and yields an effective absorption coefficient of (16 +/- 2) mm(-1), for a 280 mu m-thick sample. The introduction of the finite absorption coefficient led to the correct ratio between the thermal diffusion and thermoelastic components of the photoacoustic signal. Furthermore, it is found that the volume-absorber approach accurately describes the behavior of the amplitude, but not that of the phase recorded for a 112 mu m-thick sample, due to its relatively strong thermoelastic bending, which is not considered by this theory. Within the approximation of the small bending, the proposed volume-absorber model provides a reliable description of the photoacoustic signal for Al samples thicker than 112 mu m, and extends the applicability of the classical opaque approach. (C) 2015 AIP Publishing LLC.",
journal = "Journal of Applied Physics",
title = "Effect of the absorption coefficient of aluminium plates on their thermoelastic bending in photoacoustic experiments",
volume = "117",
number = "24",
doi = "10.1063/1.4922718"
}

Markushev, D. D., Ordonez-Miranda, J., Rabasović, M. D., Galović, S., Todorović, D. M.,& Bialkowski, S. E.. (2015). Effect of the absorption coefficient of aluminium plates on their thermoelastic bending in photoacoustic experiments. in Journal of Applied Physics, 117(24).
https://doi.org/10.1063/1.4922718

Markushev DD, Ordonez-Miranda J, Rabasović MD, Galović S, Todorović DM, Bialkowski SE. Effect of the absorption coefficient of aluminium plates on their thermoelastic bending in photoacoustic experiments. in Journal of Applied Physics. 2015;117(24).
doi:10.1063/1.4922718 .

Markushev, Dragan D., Ordonez-Miranda, Jose, Rabasović, Mihailo D., Galović, Slobodanka, Todorović, D. M., Bialkowski, S. E., "Effect of the absorption coefficient of aluminium plates on their thermoelastic bending in photoacoustic experiments" in Journal of Applied Physics, 117, no. 24 (2015),
https://doi.org/10.1063/1.4922718 . .