Gouy shift correction for highly accurate refractive index retrieval in time-domain terahertz spectroscopy

被引：91
|
作者：
Kuzel, P. [1 ]
Nemec, H. [1 ]
Kadlec, F. [1 ]
Kadlec, C. [1 ]
机构：
[1] Acad Sci Czech Republic, Inst Phys, Prague 18221 8, Czech Republic
来源：
OPTICS EXPRESS | 2010年 / 18卷 / 15期
关键词：
PROPAGATION; PULSES; FILMS; BEAMS;
D O I：
10.1364/OE.18.015338
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Terahertz spectroscopic measurements are usually performed in focused beam geometry while the standard routine for the retrieval of the sample refractive index assumes plane-wave approximation. In this paper we propose a model for the transmission function which accounts for spatially limited Gaussian terahertz beams. We demonstrate experimentally its validity and applicability for an accurate extraction of the refractive index from experimental data. (C) 2010 Optical Society of America
引用
收藏
页码：15338 / 15348
页数：11
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