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Optical and Dielectrical Properties of Opal Water Content Determination Using Terahertz Time-Domain Spectroscopy
ChuTong Gao1, Kexin Pan2, ZhiYuan Zheng1
1School of Science, China University of Geosciences (Beijing), Beijing, China.
Abstract:
The optical and dielectric properties of opals with different water contents were investigated using terahertz time-domain spectroscopy. The refractive indices and absorption coefficients showed different trends due to the different water contents. The effective medium theory was used to extract the intrinsic dielectric permittivity of opal from opal-polytetrafluoroethylene mixtures. The extracted dielectric permittivities were fitted using a double Debye model to analyze the microscopic relaxation mechanism.
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