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29. Far-infrared spectroscopy of Zn1−Mn GeAs2 single crystals: Plasma damping influence on plasmon – Phonon interaction

Author

Romcevic, N., primary, Romcevic, M., additional, Dobrowolski, W.D., additional, Kilanski, L., additional, Petrovic, M., additional, Trajic, J., additional, Hadzic, B., additional, Lazarevic, Z., additional, Gilic, M., additional, Ristic-Djurovic, J.L., additional, Paunovic, N., additional, Reszka, A., additional, Kowalski, B.J., additional, Fedorchenko, I.V., additional, and Marenkin, S.F., additional

Published
2015
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31. Optical properties of CdS thin films

Author

Gilic, M, Trajic, J, Romcevic, N, Romcevic, M, Timotijević, Dejan, Stanisic, G, Yahia, I.S, Gilic, M, Trajic, J, Romcevic, N, Romcevic, M, Timotijević, Dejan, Stanisic, G, and Yahia, I.S

Abstract

The properties of CdS thin films were investigated by applying atomic force microscopy (AFM), Raman and far-infrared spectroscopy. CdS thin films were prepared by using the thermal evaporation technique under base pressure 2 × 10−5 torr. The quality of these films was investigated by AFM spectroscopy. We applied Raman scattering and far-infrared spectroscopy to investigate the optical properties of CdS thin films, and reveal the existence of Surface Optical Phonon (SOP) mode at 297 cm−1. Effective permittivity of mixture was modeled by Maxwell–Garnet approximation. In the analysis of the far-infrared reflection spectra, a numerical model for calculating the reflectivity coefficient for a system which includes films and substrate was applied.

Published
2013

32. Spectroscopy characterization of MnSe nanoclasters randomly distributed in HgMnTe single crystal

Author

Petrovic, M., Romcevic, N., Romcevic, M., Stanisic, G., Vasiljević-Radović, Dana, Trajic, J., Lazarevic, Z., Kostic, S., Petrovic, M., Romcevic, N., Romcevic, M., Stanisic, G., Vasiljević-Radović, Dana, Trajic, J., Lazarevic, Z., and Kostic, S.

Abstract

New semimagnetic semiconductor Hg0.91Mn0.09Te-MnSe mixture, grown by Bridgman method, was investigate by Atomic Force Microscopy, X-ray and far-infrared spectroscopy, in order to obtain the necessary feedback information to determine the optimal conditions for crystal growth. The investigated mixture consists of MnSe nanoclasters randomly distributed in Hg0.91Mn0.09Te matrix. Far-infrared reflectivity spectrum of the Hg0.91Mn0.09Te-MnSe mixture was measured in the 80-500 cm(-1) range at a room temperature. The analysis of the far-infrared spectrum was made by the fitting procedure. The Maxwell-Garnett effective medium theory is used for modeling an effective dielectric function, and on that way calculating both electron and phonon response.

Published
2012

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