Volume 19 Issue 4
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Chinese Optics  > 2026  >  19(4): 1026-1034.
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. Tunable terahertz chiral response in all-dielectric BIC metasurfaces[J]. Chinese Optics, 2026, 19(4): 1026-1034. doi: 10.37188/CO.EN-2025-0045
Citation: 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. Tunable terahertz chiral response in all-dielectric BIC metasurfaces[J]. Chinese Optics, 2026, 19(4): 1026-1034. doi: 10.37188/CO.EN-2025-0045
shu

Tunable terahertz chiral response in all-dielectric BIC metasurfaces

cstr: 32171.14.CO.EN-2025-0045
  • 1.

    School of Computer and Information Engineering, Tianjin Chengjian University, Tianjin 300384, China

  • 2.

    Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science, Tianjin University, Tianjin 300072, China

  • 3.

    School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China

Funds:  Supported by the National Natural Science Foundation of China (No. 62201378, No.62375200, No.12274319)
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  • Author Bio:

    YANG Yue (1993—), female, born in Handan, Hebei Province, Ph.D., received her Ph.D. from Tianjin University in 2021. Currently serves as Lecturer at Tianjin Chengjian University, and is mainly engaged in research of terahertz wave manipulation, and the design and realization of metasurfaces. E-mail: yangyue194@tju.edu.cn

    YAO Bu-yi (2000—), male, born in Anqing, Anhui Province, Master's student at Tianjin University. His research focuses on the design and realization of metasurfaces. E-mail: yaobuyi@tju.edu.cn

    YAO Jian-quan (1939—), male, born in Shanghai, Graduated as a postgraduate from Tianjin University in 1965. Currently Professor at the College of Precision Instrument and Optoelectronics Engineering, Tianjin University; Director of the College Academic Committee; Honorary Dean; and Director of the Institute of Laser and Optoelectronics. Elected Academician of the Chinese Academy of Sciences in 1997. Prof. Yao has been engaged in research on laser and nonlinear optical frequency conversion techniques for many years, and has completed dozens of key national science and technology projects. He proposed and developed the theory and method for optimal phase matching calculation in biaxial crystals, which have been internationally recognized as the “Yao Technique” and “Yao Method” by the academic community. He has published over 1,000 papers domestically and internationally. He has supervised 35 postdoctoral fellows, 200 doctoral students, and 300 master's students. He has received the National Invention Second Prize, the Second Prize of the State Education Commission and Tianjin Science and Technology Progress Awards (four times), the First Prize of the Military Science and Technology Progress Award, and the Special Prize of the Chinese Academy of Sciences. He currently serves as a Council Member of the Chinese Optical Society, Deputy Director of the Laser Professional Committee, and President of the Tianjin Laser Society. He is a recipient of the Special Government Allowance of the State Council, and has been honored as “National Young and Middle-aged Expert with Outstanding Contributions”, “National Advanced Science and Technology Worker in Higher Education Institutions”, “National Outstanding Science and Technology Worker”, and “Tianjin Special-Class Model Worker”. E-mail: jqyao@tju.edu.cn

  • Corresponding author: yaobuyi@tju.edu.cn; htdai@tju.edu.cn; jqyao@tju.edu.cn
  • Received Date: 27 Nov 2025
  • Rev Recd Date: 18 Dec 2025
  • Accepted Date: 29 Jan 2026
    • Available Online: 12 Mar 2026
    Abstract

  • 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 high-quality 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.

     

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