Probing dielectric relaxation properties of liquid CS2 with terahertz time-domain spectroscopy
Probing dielectric relaxation properties of liquid CS2 with terahertz time-domain spectroscopy
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DOI：
10.1063/1.1586995
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发表时间：
2003-06
影响因子：
4
通讯作者：
B. L. Yu;F. Zeng;Q. Xing;R. Alfano
中科院分区：
文献类型：
--
作者：
B. L. Yu;F. Zeng;Q. Xing;R. Alfano
利用太赫兹时域光谱技术研究了液态CS2的介电弛豫特性。在0.2-2.0 THz的频率范围内测量了与频率相关的吸收系数和折射率。通过对介电函数的德拜模型拟合，确定了液态CS2的超快介电弛豫时间为630±30 fs，这是由于CS2分子具有各向异性的极化率，其摇摆和转动响应的平均时间。
Terahertz time-domain spectroscopy is used to investigate the dielectric relaxation properties of liquid CS2. The frequency-dependent absorption coefficient and index of refraction were measured in the frequency range 0.2–2.0 THz. The ultrafast dielectric relaxation time of liquid CS2 was determined to be 630±30 fs by fitting the dielectric function to the Debye model which is attributed to average time for rocking and rotational response of the CS2 molecules possessing an anisotropic polarizability.