Chiral Bound States in the Continuum in Plasmonic Metasurfaces

Yuhu Tang; Yao Liang; Jin Yao; Mu Ku Chen; Shirong Lin; Zhuo Wang; Jingcheng Zhang; Xu Guang Huang; Changyuan Yu; Din Ping Tsai

doi:10.1002/lpor.202200597

Chiral Bound States in the Continuum in Plasmonic Metasurfaces

Yuhu Tang (Co-first Author), Yao Liang^* (Co-first Author), Jin Yao, Mu Ku Chen, Shirong Lin, Zhuo Wang, Jingcheng Zhang, Xu Guang Huang^*, Changyuan Yu^*, Din Ping Tsai^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

155 Citations (Scopus)

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Abstract

Bound states in the continuum (BICs) offer novel mechanisms to boost the quality factor (Q-factor) of resonances. Unfortunately, current studies on chiral BICs metasurfaces suffer from a fundamental trade-off between Q-factor and circular dichroism (CD), presenting a significant hurdle that severely limits the independent control between CD and Q-factors. Here, 3D plasmonic metasurfaces are numerically demonstrated that overcome the trade-off and offer high-Q quasi-BIC resonances (Q ≈ 938) with strong CD (≈0.67) in the mid-infrared. These metasurfaces are made of integrated-resonance units consisting of a twisted vertical split-ring resonator (VSRR) and a wall. Importantly, this dissimilar dimer configuration unlocks a new degree of freedom to decouple the Q-factor and CD, that is, the Q-factor and CD can be relatively independently manipulated by the height of the wall and the twisted angle of the VSRR, respectively. These results provide novel paradigms to manipulate advanced chiroptical responses, with various applications that require strong CD with enhanced light-matter interaction. © 2023 The Authors. Laser & Photonics Reviews published by Wiley-VCH GmbH.

Original language	English
Article number	2200597
Journal	Laser & Photonics Reviews
Volume	17
Issue number	4
Online published	29 Jan 2023
DOIs	https://doi.org/10.1002/lpor.202200597
Publication status	Published - Apr 2023

Funding

Support is acknowledged from the Beijing-Hong Kong Universities Alliance (BHUA) fund, the Germany/Hong Kong Joint Research Scheme 2022/23 (NO. 9053045), the University Grants Committee / Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. AoE/P-502/20 and GRF Project: 15303521 and 11310522), National Natural Science Foundation of China (No. 12104296), the Shenzhen Science and Technology Innovation Commission Grant (No. SGDX2019081623281169), the Department of Science and Technology of Guangdong Province (2020B1515120073), and City University of Hong Kong (Project No. 9380131)

Research Keywords

bound states in the continuum
circular dichroism
high-Q resonances
nonlocality
plasmonic metasurfaces
PERFECT ABSORPTION
BROAD-BAND
METAMATERIAL
LIGHT

Publisher's Copyright Statement

This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

RGC Funding Information

RGC-funded

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10.1002/lpor.202200597

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abstract = "Bound states in the continuum (BICs) offer novel mechanisms to boost the quality factor (Q-factor) of resonances. Unfortunately, current studies on chiral BICs metasurfaces suffer from a fundamental trade-off between Q-factor and circular dichroism (CD), presenting a significant hurdle that severely limits the independent control between CD and Q-factors. Here, 3D plasmonic metasurfaces are numerically demonstrated that overcome the trade-off and offer high-Q quasi-BIC resonances (Q ≈ 938) with strong CD (≈0.67) in the mid-infrared. These metasurfaces are made of integrated-resonance units consisting of a twisted vertical split-ring resonator (VSRR) and a wall. Importantly, this dissimilar dimer configuration unlocks a new degree of freedom to decouple the Q-factor and CD, that is, the Q-factor and CD can be relatively independently manipulated by the height of the wall and the twisted angle of the VSRR, respectively. These results provide novel paradigms to manipulate advanced chiroptical responses, with various applications that require strong CD with enhanced light-matter interaction. {\textcopyright} 2023 The Authors. Laser & Photonics Reviews published by Wiley-VCH GmbH.",

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author = "Yuhu Tang and Yao Liang and Jin Yao and Chen, {Mu Ku} and Shirong Lin and Zhuo Wang and Jingcheng Zhang and Huang, {Xu Guang} and Changyuan Yu and Tsai, {Din Ping}",

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AU - Tang, Yuhu

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AU - Yao, Jin

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AU - Lin, Shirong

AU - Wang, Zhuo

AU - Zhang, Jingcheng

AU - Huang, Xu Guang

AU - Yu, Changyuan

AU - Tsai, Din Ping

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Chiral Bound States in the Continuum in Plasmonic Metasurfaces

Abstract

Funding

Research Keywords

Publisher's Copyright Statement

RGC Funding Information

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Ger/HKJRS: Plasmonic Nanoparticles Arrays for Functional Meta-devices

GRF: Meta-lens for Vacuum Ultraviolet Light

AoE(UGC): Meta-optics, Meta-acoustics and Meta-device

Cite this

Chiral Bound States in the Continuum in Plasmonic Metasurfaces

Abstract

Funding

Research Keywords

Publisher's Copyright Statement

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

Ger/HKJRS: Plasmonic Nanoparticles Arrays for Functional Meta-devices

GRF: Meta-lens for Vacuum Ultraviolet Light

AoE(UGC): Meta-optics, Meta-acoustics and Meta-device

Cite this