基于C3对称性破缺的多重法诺共振与光学传感  

Multiple Fano Resonances and Optical Sensing Based on C3-Symmetry-Breaking

作　　者：张景朝 罗晓清 徐晓峰 骆又麟 朱卫华[1] 陈志勇[1] 王新林[1,2] Zhang Jingzhao;Luo Xiaoqing;Xu Xiaofeng;Luo Youlin;Zhu Weihua;Chen Zhiyong;Wang Xinlin(Hunan Province Key Laboratory for UltraFast Micro/Nano Technology and Advanced Laser Manufacture,School of Electrical Engineering,University of South China,Hengyang 421001,Hunan,China;School of Mechanical Engineering,University of South China,Hengyang 421001,Hunan,China)

机构地区：[1]南华大学电气工程学院超快微纳技术与激光先进制造湖南省重点实验室,湖南衡阳421001 [2]南华大学机械工程学院,湖南衡阳421001

出　　处：《激光与光电子学进展》2023年第9期371-377,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(12104214);湖南省自然科学基金(2020JJ5466);超快微纳技术与激光先进制造湖南省重点实验室项目(2018TP1041);湖南省教育委员会基金(19C1585)。

摘　　要：数值研究了由同心C3型孔和圆环孔单元结构组成的复合超表面在近红外波段内的表面等离子体三重法诺共振效应与光学传感现象。研究结果表明,通过改变C3单元结构的对称性破缺不仅能够诱导产生可调的多重法诺共振效应,还能构建基于该效应的自参考光学传感。此外,通过改变圆环单元结构的内半径能够实现基于法诺凹陷深度的辐射监测传感。该研究为设计紧凑、可调谐的法诺共振光子器件提供了新的视角,同时可将周期性亚波长金属纳米结构扩展至生物传感和光通信领域的相关应用。In this study,we numerically investigate surface plasmonic triple Fano resonances and optical sensing in the nearinfrared band using a hybrid metasurface consisting of concentric C3-hole and circularringaperture unit cells.The results reveal that by changing the symmetry breaking of the C3 unit cells,we can not only induce a tunable multi Fano resonance effect but also enable selfreference optical sensing.In addition,a radiation monitoring sensing capability,which depends on the depth of the Fano dips,can be realized by varying the inner radius of the circularringaperture unit cells.Our results provide a new perspective for the design of compact and tunable Fano resonance photonic devices and enable the incorporation of periodic subwavelength metal nanostructures into relevant biosensing and optical communication applications.

关 键 词：光电子学 表面等离子体光子学 表面等离子体 光学传感和传感器 

分 类 号：O431[机械工程—光学工程]