Optical properties and potential applications of ε-GaSe at terahertz frequencies

Ching Wei Chen; Tsung Ta Tang; Sung Hui Lin; Jung Y. Huang; Chen Shiung Chang; Pei Kang Chung; Shun-Tung Yen; Ci Ling Pan

doi:10.1364/JOSAB.26.000A58

Optical properties and potential applications of ε-GaSe at terahertz frequencies

Ching Wei Chen, Tsung Ta Tang, Sung Hui Lin, Jung Y. Huang, Chen Shiung Chang, Pei Kang Chung, Shun-Tung Yen, Ci Ling Pan^*

^*此作品的通信作者

光電工程學系

研究成果: Article › 同行評審

70 引文斯高帕斯（Scopus）

摘要

Ordinary and extraordinary refractive indices of an ε-GaSe crystal at terahertz (THz) frequencies are experimentally determined in this study. Fitting experimental data by THz time-domain spectroscopy (THz-TDS) and a Fourier transform infrared spectrometer (FTIR), we proposed revised complex dielectric functions and Sellmeier equations of GaSe for both ordinary and extraordinary waves from 0.2 to 100 THz. Phonon vibrational modes and overtones in the THz frequency range are examined in detail. The high magnitude of the figure of merit (FOM ∼ 10³ at 1 THz), the large birefringence (δn ∼ 0.76 at 1 THz). and the low absorption coefficient (α ∼ 0.2 cm^-1 at 1 THz) of GaSe are also identified. Potential applications to practical photonic devices such as phase shifters at THz frequencies are proposed.

原文	English
頁（從 - 到）	A58-A65
期刊	Journal of the Optical Society of America B: Optical Physics
卷	26
發行號	9
DOIs	https://doi.org/10.1364/JOSAB.26.000A58
出版狀態	Published - 1 9月 2009

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title = "Optical properties and potential applications of ε-GaSe at terahertz frequencies",

abstract = "Ordinary and extraordinary refractive indices of an ε-GaSe crystal at terahertz (THz) frequencies are experimentally determined in this study. Fitting experimental data by THz time-domain spectroscopy (THz-TDS) and a Fourier transform infrared spectrometer (FTIR), we proposed revised complex dielectric functions and Sellmeier equations of GaSe for both ordinary and extraordinary waves from 0.2 to 100 THz. Phonon vibrational modes and overtones in the THz frequency range are examined in detail. The high magnitude of the figure of merit (FOM ∼ 103 at 1 THz), the large birefringence (δn ∼ 0.76 at 1 THz). and the low absorption coefficient (α ∼ 0.2 cm-1 at 1 THz) of GaSe are also identified. Potential applications to practical photonic devices such as phase shifters at THz frequencies are proposed.",

author = "Chen, {Ching Wei} and Tang, {Tsung Ta} and Lin, {Sung Hui} and Huang, {Jung Y.} and Chang, {Chen Shiung} and Chung, {Pei Kang} and Shun-Tung Yen and Pan, {Ci Ling}",

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T1 - Optical properties and potential applications of ε-GaSe at terahertz frequencies

AU - Chen, Ching Wei

AU - Tang, Tsung Ta

AU - Lin, Sung Hui

AU - Huang, Jung Y.

AU - Chang, Chen Shiung

AU - Chung, Pei Kang

AU - Yen, Shun-Tung

AU - Pan, Ci Ling

PY - 2009/9/1

Y1 - 2009/9/1

N2 - Ordinary and extraordinary refractive indices of an ε-GaSe crystal at terahertz (THz) frequencies are experimentally determined in this study. Fitting experimental data by THz time-domain spectroscopy (THz-TDS) and a Fourier transform infrared spectrometer (FTIR), we proposed revised complex dielectric functions and Sellmeier equations of GaSe for both ordinary and extraordinary waves from 0.2 to 100 THz. Phonon vibrational modes and overtones in the THz frequency range are examined in detail. The high magnitude of the figure of merit (FOM ∼ 103 at 1 THz), the large birefringence (δn ∼ 0.76 at 1 THz). and the low absorption coefficient (α ∼ 0.2 cm-1 at 1 THz) of GaSe are also identified. Potential applications to practical photonic devices such as phase shifters at THz frequencies are proposed.

AB - Ordinary and extraordinary refractive indices of an ε-GaSe crystal at terahertz (THz) frequencies are experimentally determined in this study. Fitting experimental data by THz time-domain spectroscopy (THz-TDS) and a Fourier transform infrared spectrometer (FTIR), we proposed revised complex dielectric functions and Sellmeier equations of GaSe for both ordinary and extraordinary waves from 0.2 to 100 THz. Phonon vibrational modes and overtones in the THz frequency range are examined in detail. The high magnitude of the figure of merit (FOM ∼ 103 at 1 THz), the large birefringence (δn ∼ 0.76 at 1 THz). and the low absorption coefficient (α ∼ 0.2 cm-1 at 1 THz) of GaSe are also identified. Potential applications to practical photonic devices such as phase shifters at THz frequencies are proposed.

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Optical properties and potential applications of ε-GaSe at terahertz frequencies

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