1. Sensitive Terahertz Free Space Modulator Using CsPbBr3 Perovskite Quantum Dots–Embedded Metamaterial
- Author
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Wang Kai-hong, Li Jiu-sheng, and Yao Jian-Quan
- Subjects
010302 applied physics ,Radiation ,Materials science ,business.industry ,Terahertz radiation ,Physics::Optics ,Resonance ,Metamaterial ,Condensed Matter Physics ,01 natural sciences ,010309 optics ,Photoexcitation ,Optical pumping ,Condensed Matter::Materials Science ,Quantum dot ,Modulation ,0103 physical sciences ,Optoelectronics ,Electrical and Electronic Engineering ,business ,Instrumentation ,Perovskite (structure) - 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.
- Published
- 2020