Open AccessA Broadband THz-TDS System Based on DSTMS Emitter and LTG InGaAs/InAlAs Photoconductive Antenna Detector
Author(s) -
Ying Zhang,
Xiaoling Zhang,
Shaoxian Li,
Jianqiang Gu,
Yanfeng Li,
Zhen Tian,
Chunmei Ouyang,
Ming He,
Jiaguang Han,
Weili Zhang
Publication year - 2016
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep26949
Subject(s) - terahertz radiation , optoelectronics , common emitter , materials science , detector , laser , terahertz time domain spectroscopy , broadband , optics , photoconductivity , antenna (radio) , time domain , terahertz spectroscopy and technology , physics , telecommunications , computer science , computer vision
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.