PACS: 61.43.-j, 78.30.-j

Investigation of nanophase separation in IR optical glasses As40Se60 using resonant Raman scattering
N. Mateleshko1, V. Mitsa1, M. Veres2, M. Koos2, A. Stronski3

1Uzhgorod State University, Department of Solid State Electronics
32, Voloshin str., 88000 Uzhgorod, Ukraine, E-mail: mitsa@univ.uzhgorod.ua
2Research Institute for Solid State Physics and Optics H-1121 Budapest Konkoly Thege M. u. 29-33. Hungary
3V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
41, prospect Nauky, 03028 Kyiv, Ukraine

Abstract. Resonant Raman spectra of stoichiometric glass (g) g-As40Se60 have been investigated. It was observed that the increasing of excitation radiation energy hv>E0 (E0 is pseudogap width) changes a shape, intensity, and position of Raman peaks of g-As40Se60. The structure and vibration spectra of some As-Se clusters were calculated applying the ab initio method. In order to elucidate structural features of g-As40Se60, we combined the experimental Raman data and theoretical calculations.
Keywords: chalcogenide glasses, resonant Raman spectra
Paper received 01.03.04; accepted for publication 17.06.04.

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