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Please use this identifier to cite or link to this item: http://elib.bsu.by/handle/123456789/14649
Title: Ultrabroadband terahertz spectroscopy of chalcogenide glasses
Authors: Zalkovskij, Maksim
Bisgaard, Christer Zoffmann
Novitsky, Andrey V.
Malureanu, Radu
Savastru, Dan
Popescu, Aurelian
Jepsen, Peter Uhd
Lavrinenko, Andrei V.
Issue Date: 2012
Citation: APPLIED PHYSICS LETTERS 100, 031901 (2012)
Abstract: Chalcogenide glasses are receiving a lot of attention due to their unique optical properties. In this paper we study the optical properties of As2S3 and GaLaS glasses in a broad terahertz (THz) frequency range (0.2-18 THz). Complex dispersion behavior with drastic changes of refractive index and absorption coefficient is found for both glasses. We observe the breakdown of the universal power-law dependence of the absorption coefficient due to atomic vibrations observed at low THz frequencies in disordered materials, and see the transition to localized vibrational dynamics for the As2S3 compound at higher frequencies. In addition, As2S3 displays two transparency regions, at 7-8 THz and 12.2 THz, of potential interest for future nonlinear applications in the THz range
URI: http://elib.bsu.by/handle/123456789/14649
Appears in Collections:Кафедра теоретической физики и астрофизики

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