Dual Control of Enhanced Quasi-Bound States in the Continuum Emission from Resonant c-Si Metasurfaces

被引：18

作者：

Zhang, Zhenghe ^{[1
,2
,3
,4
]}

Xu, Chaojie ^{[5
,6
]}

Liu, Chen ^{[1
,2
,3
,4
]}

Lang, Man ^{[1
,2
,3
,4
]}

Zhang, Yuehao ^{[1
,2
,3
,4
]}

Li, Minghao ^{[4
,7
,8
]}

Lu, Wanli ^{[4
,9
]}

Chen, Zefeng ^{[1
,2
,3
,4
]}

Wang, Chinhua ^{[1
,2
,3
,4
]}

Wang, Shaojun ^{[1
,2
,3
,4
]}

Li, Xiaofeng ^{[1
,2
,3
,4
]}

机构：

[1] Soochow Univ, Sch Optoelect Sci & Engn, Suzhou 215006, Peoples R China

[2] Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China

[3] Soochow Univ, Key Lab Adv Opt Mfg Technol Jiangsu Prov, Suzhou 215006, Peoples R China

[4] Soochow Univ, Key Lab Modern Opt Technol, Educ Minist China, Suzhou 215006, Peoples R China

[5] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Peoples R China

[6] Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat Devices, Suzhou 215123, Peoples R China

[7] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

[8] Univ Basel, Swiss Nanosci Inst, CH-4056 Basel, Switzerland

[9] China Univ Min & Technol, Sch Mat Sci & Phys, Xuzhou 221116, Peoples R China

来源：

NANO LETTERS | 2023年 / 23卷 / 16期

基金：

中国国家自然科学基金;

关键词：

radiation efficiency; opticalbound states in the continuum; dielectric nanoantenna array; multipolar control; collective resonances; polarization-vortex emission; VORTEX;

D O I：

10.1021/acs.nanolett.3c02148

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Opticalbound states in the continuum (BICs) offer strong interactionswith quantum emitters and have been extensively studied for manipulatingspontaneous emission, lasing, and polariton Bose-Einstein condensation.However, the out-coupling efficiency of quasi-BIC emission, crucialfor practical light-emitting devices, has received less attention.Here, we report an adaptable approach for enhancing quasi-BIC emissionfrom a resonant monocrystalline silicon (c-Si) metasurface throughlattice and multipolar engineering. We identify dual-BICs originatingfrom electric quadrupoles (EQ) and out-of-plane magnetic dipoles,with EQ quasi-BICs exhibiting concentrated near-fields near the c-Sinanodisks. The enhanced fractional radiative local density of statesof EQ quasi-BICs overlaps spatially with the emitters, promoting efficientout-coupling. Furthermore, coupling the EQ quasi-BICs with Rayleighanomalies enhances directional emission intensity, and we observeinherent opposite topological charges in the multipolarly controlleddual-BICs. These findings provide valuable insights for developingefficient nanophotonic devices based on quasi-BICs.

引用

页码：7584 / 7592

页数：9

共 46 条

[1] Polariton Bose-Einstein condensate from a bound state in the continuum [J].