Nonvolatile Switchable Broadband Polarization Conversion with Wearable Terahertz Chalcogenide Metamaterials

• DOI: 10.1002/adom.202202439
• Publication Date: 2023-03-10T04:41:24Z
• Authors: Meng Lian; Ying Su; Kuan Liu; Shoujun Zhang; Xieyu Chen; Haonan Ren; Yihan Xu; Jiajia Chen; Zhen Tian; Tun Cao

Abstract Polarization is a fundamental characteristic of light waves carrying sensitive measurement and signal communication information. Traditional schemes for advanced controlling polarization impose stringent requirements on material features obtain merely limited performance. Integration diversified switchable functions into monolithic metamaterials has become rising research field, particularly the terahertz (THz) spectrum. However, study wearable meta‐converter with nonvolatile operation stays unexplored. Here, switching metamaterial‐induced ultra‐broadband very efficient reflective linear conversion at THz frequency experimentally realized. When as‐deposited Ge 2 Sb Te 5 (GST225) capping layer proposed converter in amorphous state, multilayered possess triple neighboring peak resonances, by which incident could be converted to its orthogonal counterpart reflection. The measured ratio (PCR) under normal incidence above 0.7 spectrum ranging from 0.53 1.25 THz. Notably, strength PCR can continuously tuned as gradually transiting structural state GST225 crystalline. This may pave an avenue dynamically states bring more possibilities flexible meta‐devices various applications imaging, spectroscopy, communications.