Jie Ji, Siyan Zhou, Weijun Wang, Furi Ling, Jianquan Yao
https://pubs.rsc.org/en/Content/ArticleLanding/2019/NR/C8NR08813F#!divAbstract
Active control of terahertz wave is critical to the development of terahertz devices. Two dimensional materials with excellent optical properties provide more choices for opto-electrical devices with the maturity of their preparation technology. We proposed a hybrid structure of metamaterial/monolayer MoS2/Si and investigated its optical properties in terahertz range. The phenomenon of the plasmon-induced transparency (PIT) effect was observed in the transmission spectra, resulting from near-field coupling of two bright modes. According to simulated results, the phenomenon was confirmed its dependency on the length of the cutwire and distance between DSSRs. Furthermore, an external optical field supported by a 1064 nm laser could realized a switch effect on the sample. The resonances of the PIT metamaterial was disappeared when the optical power was further increased, as excited carriers in MoS2/Si substrate blocked the coupling effect. In addition, experimental results inferred that the PIT metamaterial enhanced the interaction of infrared light with monolayer MoS2/Si substrate.
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