Ultrabroadband terahertz spectroscopy of chalcogenide glasses

Maksim Zalkovskij; Christer Zoffmann Bisgaard; Andrey Novitsky; Radu Malureanu; Dan Savastru; Aurelian Popescu; Peter Uhd Jepsen; Andrei Lavrinenko

doi:10.1063/1.3676443

Ultrabroadband terahertz spectroscopy of chalcogenide glasses

Maksim Zalkovskij, Christer Zoffmann Bisgaard, Andrey Novitsky, Radu Malureanu, Dan Savastru, Aurelian Popescu, Peter Uhd Jepsen, Andrei Lavrinenko

National R&D Institute for Optoelectronics

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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.

Original language	English
Journal	Applied Physics Letters
Volume	100
Issue number	3
Pages (from-to)	031901
ISSN	0003-6951
DOIs	https://doi.org/10.1063/1.3676443
Publication status	Published - 2012

Bibliographical note

Copyright (2012) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters / Volume 100 / Issue 3 and may be found at http://apl.aip.org/resource/1/applab/v100/i3/p031901_s1.

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title = "Ultrabroadband terahertz spectroscopy of chalcogenide glasses",

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.",

author = "Maksim Zalkovskij and Bisgaard, {Christer Zoffmann} and Andrey Novitsky and Radu Malureanu and Dan Savastru and Aurelian Popescu and Jepsen, {Peter Uhd} and Andrei Lavrinenko",

note = "Copyright (2012) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters / Volume 100 / Issue 3 and may be found at http://apl.aip.org/resource/1/applab/v100/i3/p031901_s1.",

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AU - Zalkovskij, Maksim

AU - Bisgaard, Christer Zoffmann

AU - Novitsky, Andrey

AU - Malureanu, Radu

AU - Savastru, Dan

AU - Popescu, Aurelian

AU - Jepsen, Peter Uhd

AU - Lavrinenko, Andrei

N1 - Copyright (2012) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters / Volume 100 / Issue 3 and may be found at http://apl.aip.org/resource/1/applab/v100/i3/p031901_s1.

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

U2 - 10.1063/1.3676443

DO - 10.1063/1.3676443

M3 - Journal article

SN - 0003-6951

VL - 100

SP - 031901

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 3

ER -

Ultrabroadband terahertz spectroscopy of chalcogenide glasses

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