Tunable terahertz chiral response in all-dielectric BIC metasurfacesOA
Chiral metasurfaces play critical role in physics,materials science,pharmacognosy,and communications.To achieve high-performance chiral responses,such as high circular dichroism(CD)and highquality factors(Q-factors),bound-state-in continuum(BIC),BIC-based metasurfaces have been extensively studied as a promising platform.However,most realized BIC metasurfaces rely on metallic constituents whose high electromagnetic losses and absence of dynamic chirality tuning together impose a severe limit on their practical potential.This paper presents an all-dielectric chiral BIC metasurface.By illumination symmetry breaking,the metasurface exhibits a CD value of 0.93.Additionally,dynamic tuning of CD is enabled by external optical pumping.This scheme provides a new avenue for dynamically manipulating the chiral metasurface,which can be used to achieve more complex dynamic chiral characterization and applications.
YANG Yue;YAO Bu-yi;DAI Hai-tao;HAO Xi-chen;WANG Yu-han;WANG Ruo-tong;GUO Ting-yang;DU Wen;GAO Ming;TAN Qi;LI Ji-ning;YAO Jian-quan
School of Computer and Information Engineering,Tianjin Chengjian University,Tianjin 300384,ChinaTianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology,School of Science,Tianjin University,Tianjin 300072,ChinaTianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology,School of Science,Tianjin University,Tianjin 300072,ChinaTianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology,School of Science,Tianjin University,Tianjin 300072,ChinaTianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology,School of Science,Tianjin University,Tianjin 300072,ChinaTianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology,School of Science,Tianjin University,Tianjin 300072,ChinaTianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology,School of Science,Tianjin University,Tianjin 300072,ChinaTianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology,School of Science,Tianjin University,Tianjin 300072,ChinaTianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology,School of Science,Tianjin University,Tianjin 300072,ChinaSchool of Precision Instruments and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,ChinaSchool of Precision Instruments and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,ChinaSchool of Precision Instruments and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China
通用工业技术
all-dielectric metasurfacecircular dichroismdynamic controlterahertz
《中国光学(中英文)》 2026 (4)
P.1026-1034,9
国家自然科学基金(No.62201378,No.62375200,No.12274319)。
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