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Sensitive Terahertz Free Space Modulator Using CsPbBr 3 Perovskite Quantum Dots–Embedded Metamaterial
Journal of Infrared Millimeter and Terahertz Waves ( IF 1.765 ) Pub Date : 2020-03-04 , DOI: 10.1007/s10762-020-00680-8
Wang Kai-Hong, Li Jiu-Sheng, Yao Jian-Quan

Abstract We have demonstrated a method for active modulating terahertz wave using CsPbBr3 perovskite quantum dots (QDs)–embedded double-C metallic metamaterial unit cells. The resonance response frequency of the proposed CsPbBr3 perovskite QDs-embedded metamaterial can be tuned by varying the external applied photoexcitation intensity. By doing so, we measured the dynamic terahertz wave transmission modulation and demonstrate tuning of the terahertz wave resonant response based on the optical pump fluences. The modulation speed and depth of the modulator are 5 MHz and 88.3%, respectively. Our results indicate the importance of manipulating the terahertz wave for future wireless communication.
更新日期:2020-04-14

 

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