Multi-state polarization switching and multifunction-integrated terahertz metadevice enabled by inverse resonance responses

Frontiers in Physics

Physics

Cunlin Zhang¹  Yulei Shi¹  Pujing Zhang¹  Xuteng Zhang¹  Qingli Zhou¹  Wanlin Liang¹  Yuwang Deng¹  Tingyin Ning² 

[1] Beijing Advanced Innovation Center for Imaging Theory and Technology, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, Capital Normal University, Beijing, China;Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan, China;

关键词: terahertz;    metadevice;    multi-state polarization switching;    multifunction-integrated;    resonance coupling;   

DOI  :  10.3389/fphy.2023.1234054

 received in 2023-06-03, accepted in 2023-07-24,  发布年份 2023

来源: Frontiers

【 摘 要 】

Dynamical control of terahertz metadevices and integration of versatile functions are highly desired due to increasing practical demands. Here, we propose a multifunctional photosensitive Si hybrid metastructure consisting of twisted split-ring resonator pairs that could empower multi-state polarization switching and object-recognized imaging. The theoretical and simulated results show that inverse complete modulation of cross-polarized components could be realized via tuning the conductivity of the Si-bridge. The calculated ellipticity indicates that our metadevices possess the ability to convert linearly polarized light into left-hand circular-polarized or right-hand circular-polarized waves, as well as left-hand circular-polarized or right-hand circular-polarized into linearly polarized states. Combined with these properties, mono-parameter amplitude imaging and amplitude-phase synergistic encryption imaging are accomplished. Our research provides a new strategy to develop reconfigurable and multifunctional components in the terahertz regime.

【 授权许可】

Unknown   
Copyright © 2023 Deng, Zhou, Zhang, Zhang, Liang, Ning, Shi and Zhang.