ZnS超表面中BIC物理特性研究及应用  

Study and Application of BIC Physical Properties in ZnS Metasurfaces

作　　者：金萍 朱雅慧 孙铭泽 张晴[1] 周胜[1,2] Jin Ping;Zhu Yahui;Sun Mingze;Zhang Qing;Zhou Sheng(Harbin Normal University;Guangzhou Martime University)

机构地区：[1]哈尔滨师范大学 [2]广州航海学院

出　　处：《哈尔滨师范大学自然科学学报》2024年第5期74-81,共8页Natural Science Journal of Harbin Normal University

基　　金：广州航海学院,广州交通大学(筹)引进人才科研启动项目“电磁双曲超表面连续谱束缚态物理机制及其应用研究”;广东省普通高校特色创新类项目(2024KTSCX142)“外磁场调控反铁磁超表面连续谱束缚态手性光学性质研究”;哈尔滨师范大学研究生课程建设项目;哈尔滨师范大学研究生创新项目(HSDSSCX2022-49)

摘　　要：提出了一种介电常数随频率可变的离子晶体硫化锌(ZnS)超表面结构(MS),用于研究连续体中的束缚态(BICs).通过分析其近场电场分布及色散曲线发现ZnS MS存在对称保护型BIC,通过破坏MS的对称性,BICs转换为准BICs,特征频率约为8.74×10^(12)Hz,Q因子高达298.8.通过反射光谱和多极理论研究揭示了电偶极子(ED)对共振现象具有决定性的影响.ZnS超表面结构在光波调控、光学滤波器、光学传感器等领域的应用潜力巨大.An ion crystal zinc sulfide(ZnS)metasurface structure(MS)with a variable dielectric constant as a function of frequency is proposed for studying bound states in the continuum(BICs).The study found that by breaking the symmetry of the MS,symmetry-protected BICs can be realized.Further analysis of its near-field distribution and dispersion curves verified that at the characteristic frequency(approximately 8.74505×10^(12) Hz),BICs transform into quasi-BICs,achieving a Q factor as high as 298.809.Moreover,the reflection spectrum and multipolar theory revealed that electric dipoles(ED)have a decisive influence on the resonance phenomenon.These findings indicate that ZnS metasurface structures have significant potential for applications in optical wave control,optical filters,optical sensors,and other fields.

关 键 词：离子晶体超表面 连续体中的束缚态 Q因子 折射率 电多极子 

分 类 号：O441[理学—电磁学]