Polarization modulation time-domain terahertz polarimetry

被引：88
|
作者：
Morris, C. M. [1 ]
Aguilar, R. Valdes [1 ]
Stier, A. V. [1 ]
Armitage, N. P. [1 ]
机构：
[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
来源：
OPTICS EXPRESS | 2012年 / 20卷 / 11期
关键词：
SUPERCONDUCTIVITY; RESOLUTION; RADIATION; LIGHT;
D O I：
10.1364/OE.20.012303
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present high precision measurements of polarization rotations in the frequency range from 0.1 to 2.5 THz using a polarization modulation technique. A motorized stage rotates a polarizer at similar to 80 Hz, and the resulting modulation of the polarization is measured by a lock-in technique. We achieve an accuracy of 0.05 degrees (900 mu rad) and a precision of 0.02 degrees (350 mu rad) for small rotation angles. A detailed mathematical description of the technique is presented, showing its ability to fully characterize elliptical polarizations from 0.1 to 2.5 THz. (C) 2012 Optical Society of America
引用
收藏
页码：12303 / 12317
页数：15
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