Developments in THz-Range Ellipsometry: Quasi-Optical Ellipsometer
Developments in THz-Range Ellipsometry: Quasi-Optical Ellipsometer
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太赫兹范围椭偏仪的进展：准光学椭偏仪
DOI：
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发表时间：
2016
影响因子：
3.2
通讯作者：
Yevgeny M. Kuleshov
中科院分区：
文献类型：
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作者：
A. Galuza;V. K. Kiseliov;I. Kolenov;A. Belyaeva;Yevgeny M. Kuleshov
描述了一种用于0.1- 1 THz太赫兹波段多角度椭偏测量的新型实验装置。该仪器以偏振器-补偿器-样品-分析器配置操作，并允许各种测量方案（例如，零位和旋转分析器）。椭偏仪是基于准光学透射线-中空介质光束波导（HDB）-和一套基于HDB的组件，提供了与已知的类似物相比，椭偏仪的主要优点。HDB在没有任何透镜或反射镜的情况下在整个通道横截面上提供辐射的几乎平坦的相位前。超宽带准光学透射线提供了在0.1- 1 THz频率范围内的椭圆偏振仪的操作，而无需对配置和/或构造进行任何修改。这种设置可以非常容易地组装/拆卸（作为乐高meccano），并很容易集成到其他设备中。椭圆偏振仪的实验测试进行了比较的介电常数的一组材料测量的设置与参考数据和独立的反射测量的结果。
A novel experimental setup for multiangular ellipsometric measurements in terahertz spectral range 0.1- 1 THz is described. The instrument operates in polarizer-compensator-sample-analyzer configuration and allows various measurement schemes (e.g., null and rotating analyzer). The ellipsometer is based on quasi-optical transmittance line-hollow dielectric beamguide (HDB)-and a kit of HDB-based components that provided main advantages of the ellipsometer as compared with known analogs. HDB provides almost flat phase front of the radiation on the entire channel cross section without any lenses or mirrors. Ultra-broadband quasi-optical transmittance line provides operation of the ellipsometer within 0.1- 1 THz frequency range without any modifications of configuration and/or construction. This setup can be assembled/disassembled very easily (as a LEGO meccano) and is easily integrated into other equipment. Experimental testing of the ellipsometer was carried out by comparing dielectric constants of a set of materials measured by the setup with reference data and with the results of independent reflectometry measurements.