journal article·2020-04-01Open access

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

Zhiyuan Fan, Zhaoxin Geng, Weihao Fang, Xiaoqing Lv, Yue Su, Shicai Wang, Jian Liu, Hongda Chen

AIP Advances· Volume 10· Issue 4

Abstract

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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Research context

OpenAlex topics: 2D Materials and Applications · Terahertz technology and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences 1 , Beijing 100049, China

State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences 2 , Beijing 100083, China

School of Information Engineering, Minzu University of China 3 , Beijing 100081, China

State Key Laboratory of Crystal Materials, Shandong University 4 , Jinan 250100, China

State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences 5 , Beijing 100083, China

Funding

The National Key R&D Plan · The National Natural Science Foundation of China · The Key Program of Natural Science Foundation of Beijing · The Opened Fund of the State Key Laboratory of Integrated Optoelectronics · The Leading Project of Youth Academic Team @ Minzu University of China · Research Project of Scientific Research Equipment of CAS · China Postdoctoral Science Foundation

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