AUTHOR=Xu Boli , Zhong Renbin , Liang Zekun , Fang Zheng , Fang Jianhui , Zhang Huimin , Wu Zhenhua , Zhang Kaichun , Hu Min , Liu Diwei 

TITLE=A Tunable Multifunctional Terahertz Asymmetric Transmission Device Hybrid With Vanadium Dioxide Blocks

JOURNAL=Frontiers in Materials

VOLUME=9

YEAR=2022

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2022.881229

DOI=10.3389/fmats.2022.881229

ISSN=2296-8016

ABSTRACT=<p>A tunable multifunctional terahertz metamaterial asymmetric transmission device is proposed. The device is composed of three layers from top to bottom, i.e., Ge–SiO<sub>2</sub>–Ge. The germanium layer with a VO<sub>2</sub> block enables it to work in two operating modes by controlling the state of the VO<sub>2</sub> blocks, thereby flexibly realizing asymmetric forward and backward transmission with specific polarization. The device is endowed with a more flexible design of electromagnetic systems, rendering it suitable for applications in polarization converters, polarization filters, and other polarization modulators.</p>