Research on optical controlled terahertz modulator based on monolayer tungsten disulfide
Received:September 18, 2018  Revised:July 21, 2019  download
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Author NameAffiliationE-mail
FU Ya-Zhou Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of Sciences, Beijing 100049, China 
yzfu@mail.sim.ac.cn 
TAN Zhi-Yong Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of Sciences, Beijing 100049, China 
 
WANG Chang Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of Sciences, Beijing 100049, China 
 
CAO Jun-Cheng Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of Sciences, Beijing 100049, China 
 
Abstract:Controlling the propagation of terahertz (THz) wave is very important in the application of THz technology. THz modulator is considered to be the key device in next-generation THz wireless communication. A new-type optically pumped THz modulator based on Si-grown monolayer tungsten disulfide (WS2) was demonstrated. WS2 acts as a catalyst due to the formation of heterojunction at the junction between Si substrate and WS2, since more carriers are catalyzed at the heterojunction under pumping power, the modulator can achieve more deep modulation depth. The result shows that the modulation depth of this Si-grown monolayer WS2 modulator can reach 63.6% under the low pumping power of 117 mW and the wavelength of the pump light is 660 nm. This novel two-dimensional transition metal dichalcogenides with high modulation efficiency have a great prospect in the application of THz technology.
keywords:Terahertz  optical controlled modulator  monolayer tungsten disulfide  catalytic
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Copyright:《Journal of Infrared And Millimeter Waves》