AUTHOR=Xiong Ri-Hui , Peng Xiao-Qing , Li Jiu-Sheng 

TITLE=Terahertz Switch Utilizing Inorganic Perovskite-Embedded Metasurface

JOURNAL=Frontiers in Physics

VOLUME=8

YEAR=2020

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2020.00141

DOI=10.3389/fphy.2020.00141

ISSN=2296-424X

ABSTRACT=<p>Various applications of terahertz technology require a large number of various terahertz wave control devices. Yet, high efficient and rapid-response terahertz switch is still a great challenge. Here, we introduce a new scheme, based on inorganic perovskite quantum dot (CsPbBr<sub>3</sub>-QD)-embedded metasurface under different pump laser powers that realize terahertz wave high-speed switching performance. The off–on speed of the presented device achieves 8 MHz. This kind of components provides a new idea and a cost-effective functional solution for manipulating the terahertz waves in emerging terahertz devices and systems.</p>