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

作者：Zhang, Ying; Zhang, Xiaoling; Li, Shaoxian; Gu, Jianqiang^*; Li, Yanfeng; Tian, Zhen; Ouyang, Chunmei; He, Mingxia; Han, Jiaguang^*; Zhang, Weili

来源：Scientific Reports, 2016, 6(1): 26949.

DOI：10.1038/srep26949

• ORGANIC-CRYSTAL DSTMS
• TIME-DOMAIN SPECTROSCOPY
• TERAHERTZ PULSES
• OPTICAL RECTIFICATION
• GENERATION
• LASER
• DAST
• RADIATION
• WAVELENGTHS
• EXCITATION

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.

• 出版日期2016-5-31
• 单位天津大学