Characteristics of transition metal dichalcogenides in optical pumped modulator of terahertz wave

被引：21
作者：
Fan, Zhiyuan [1 ,2 ]
Geng, Zhaoxin [2 ,3 ]
Fang, Weihao [1 ,2 ]
Lv, Xiaoqing [1 ,2 ]
Su, Yue [1 ,2 ]
Wang, Shicai [4 ]
Liu, Jian [1 ,5 ]
Chen, Hongda [1 ,2 ]
机构：
[1] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[2] Chinese Acad Sci, Inst Semicond, State Key Lab Integrated Optoelect, Beijing 100083, Peoples R China
[3] Minzu Univ China, Sch Informat Engn, Beijing 100081, Peoples R China
[4] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
[5] Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China
来源：
AIP ADVANCES | 2020年 / 10卷 / 04期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
FAR-INFRARED RADIATION; RAMAN-SPECTRA; MONOLAYER; MOS2;
D O I：
10.1063/1.5141511
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
To study the characteristics of transition metal dichalcogenides (TMDCs) in the THz regime, several kinds of terahertz modulators based on TMDCs were fabricated. The properties of these terahertz modulators were measured on a terahertz time-domain spectroscopy system. An 808-nm laser was used as the controller of the THz modulator. Briefly, as the power of the pumping laser increased, the amplitude of the transmission THz wave decreased. To explain these results, an analysis based on photoconductivity was presented. Additionally, the influence of the boundary defects was pointed out to give further explanation about the working mechanism of the TMDC-based THz modulator. Based on this analysis, most of the behavior of TMDCs in THz modulators could be understood.
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页数：9
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