A Broadband THz-TDS System Based on DSTMS Emitter and LTG InGaAs/InAlAs Photoconductive Antenna Detector

Ying Zhang; Xiaoling Zhang; Shaoxian Li; Jianqiang Gu; Yanfeng Li; Zhen Tian; Chunmei Ouyang; Mingxia He; Jiaguang Han; Weili Zhang

doi:10.1038/srep26949

A Broadband THz-TDS System Based on DSTMS Emitter and LTG InGaAs/InAlAs Photoconductive Antenna Detector

Sci Rep. 2016 May 31:6:26949. doi: 10.1038/srep26949.

Authors

Ying Zhang¹, Xiaoling Zhang¹, Shaoxian Li¹, Jianqiang Gu¹, Yanfeng Li¹, Zhen Tian¹, Chunmei Ouyang¹, Mingxia He¹, Jiaguang Han¹, Weili Zhang^{1

2}

Affiliations

¹ Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, and Key Laboratory of Optoelectronics Information and Technology, Ministry of Education of China, Tianjin 300072, People's Republic of China.
² School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.

Abstract

We demonstrate a 4-f terahertz time-domain spectroscopy (THz-TDS) system using an organic crystal DSTMS as the THz emitter and a low temperature grown (LTG) InGaAs/InAlAs photoconductive antenna as the receiver. The system covers a frequency range from 0.2 up to 8 THz. The influences of the pump laser power, the probe laser power and the azimuthal angle of the DSTMS crystal on the time-domain THz amplitude are experimentally analyzed. The frequency accuracy of the system is verified by measuring two metamaterial samples and a lactose film in this THz-TDS system. The proposed combination of DSTMS emission and PC antenna detection realizes a compact and low-cost THz-TDS scheme with an ultra-broad bandwidth, which may promote the development and the applications of THz-TDS techniques.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't