Dual-Band Chiral Nonlinear Metasurface Supported by Quasibound States in the Continuum
被引:16
作者:
Liu, Qing-Song
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China
Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R ChinaChinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China
Liu, Qing-Song
[1
,2
]
Chao, Ming-Hao
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China
Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R ChinaChinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China
Chao, Ming-Hao
[1
,2
]
Zhang, Wen-Jing
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China
Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R ChinaChinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China
Zhang, Wen-Jing
[1
,2
]
Song, Guo-Feng
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China
Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R ChinaChinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China
Song, Guo-Feng
[1
,2
]
机构:
[1] Chinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China
[2] Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China
bound states in the continuum;
chirality;
nonlinear metasurface;
2ND-HARMONIC GENERATION;
D O I:
10.1002/andp.202200263
中图分类号:
O4 [物理学];
学科分类号:
0702 ;
摘要:
This paper presents an all-dielectric chiral metasurface composed of an array of two-layer distorted square structures with nanoholes. This metasurface can simultaneously generate dual-band opposite chiral responses, which can be attributed to the bound states in the continuum (BICs) and the distorted chiral structure. By combining the BICs with chirality, a dual-band chiral nonlinear metasurface and a chiral-sensing method are proposed. The simulated results show that the third harmonic generation (THG) conversion efficiency can reach the order of 10(-4) for two peaks with a peak-pump intensity of approximately 5.3 GW cm(-2) in the near-infrared region. Moreover, the third-harmonic circular dichroism for each peak can reach up to 0.99 and -0.94, respectively. Furthermore, it is theoretically demonstrated that this metasurface can be used for chiral sensing with high sensitivities. These results provide new insights for linear and nonlinear spin-dependent applications.