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首页> 外文会议>Conference on Terahertz Photonics; 20071112-14; Beijing(CN) >THz Time-Domain Spectroscopy of Cesium Iodide
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THz Time-Domain Spectroscopy of Cesium Iodide

机译：碘化铯的太赫兹时域光谱

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摘要

The optical properties of Cesium Iodide (CsI) in the frequency range from 0.1 to 2.0 THz were studied by employing THz time-domain spectroscopy. The CsI samples were synthesized using CsI powder that was pressed into 2 mm thick pellets. The obtained time-domain data were transformed into the frequency domain using Fourier Transforms, and then analyzing the respective phase and amplitude spectra, the refractive index (RI) and the absorption constant of CsI were deduced. The RI of CsI is seen to increase from 2.55 to 3.15 as the frequency increases from 0.15 to 1.4 THz. For frequencies above 1.4 THz, the data was unusable due to the increased absorption. The empirical Sellmeier equation was used to fit the frequency-dependent RI and to determine the absorption wavelength λ_1.
机译：利用太赫兹时域光谱技术研究了铯碘化物（CsI）在0.1至2.0 THz频率范围内的光学特性。使用压成2毫米厚的小球的CsI粉末合成CsI样品。使用傅立叶变换将获得的时域数据转换为频域，然后分析各自的相位和幅度谱，推导CsI的折射率（RI）和吸收常数。随着频率从0.15 THz增加到1.4 THz，CsI的RI从2.55增加到3.15。对于高于1.4 THz的频率，由于吸收增加，因此无法使用该数据。使用经验Sellmeier方程拟合与频率相关的RI，并确定吸收波长λ_1。

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