红外与毫米波学报2017，Vol.36Issue(3)：266-269,294,5.DOI:10.11972/j.issn.1001-9014.2017.03.003
探测光波长对太赫兹波电光取样探测技术的影响
Influence of wavelength of probe laser on terahertz free-space electro-optic sampling detection
摘要
Abstract
The wavelength of the probe laser can affect the bandwidth and the efficiency of terahertz electro-optic sampling (EOS) detection method because of the relationship of velocity match between the terahertz phase velocity and the laser group velocity.An electro-optic (EO) crystal has different dispersion with different lasers,thus the wavelength of the probe laser for a given EO crystals have different influence on the EOS detection.The response functions of EOS systems based on two typical EO crystals,ZnTe and GaP,have been studied.The results show that the probe laser with wavelengths of 800 nm and 1200 nm are more suitable for the ZnTe-and GaP-based EOS system,respectively,than other selected wavelengths (600 nm,800 nm,1200 nm and 1600 nm).We also found that for a given thickness of an EO crystal,there exists an optimal wavelength for the probe laser pulse to obtain the broadest response function with high value.关键词
太赫兹波/电光取样/探测激光/响应函数Key words
terahertz/electro-optic sampling/probe laser/response function分类
数理科学引用本文复制引用
杜海伟,彭晓昱..探测光波长对太赫兹波电光取样探测技术的影响[J].红外与毫米波学报,2017,36(3):266-269,294,5.基金项目
Supported by the Key Project of the Special Fund for Research in Basic Science and Frontier Technology in Chongqing (cstc2015jcyjBX0030) and the Innovative Research Fund (Y52A010V10) of Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences. （cstc2015jcyjBX0030）
