Broadband perfect optical absorption enabled by quasi-bound states in the continuum in graphene non-concentric rings

Xu, Kun; Huang, Jikun; Wang, Weihua

doi:10.1039/d2cp04573g

Phys. Chem. Chem. Phys.

2023

DOI: 10.1039/d2cp04573g

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Broadband perfect optical absorption enabled by quasi-bound states in the continuum in graphene non-concentric rings

Kun Xu

Jikun Huang

Weihua Wang

Abstract: Graphene plasmons, possessing a lot of unique optical properties, have been employed to enable a variety of applications in the THz frequency range. Here, we demonstrate bound states in the...

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Cited by 8 publications

References 53 publications

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Flexible Terahertz Metasurface Absorbers Empowered by Bound States in the Continuum

Xu,

Xue,

Fan

et al. 2024

Advanced Materials

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Terahertz absorbers are crucial to the cutting‐edge techniques in the next‐generation wireless communications, imaging, sensing, and radar stealth, as they fundamentally determine the performance of detectors and cloaking capabilities. It has long been a pressing task to find absorbers with customizable performance that can adapt to various environments with low cost and great flexibility. Here, perfect absorption empowered by bound states in the continuum (BICs) is demonstrated, allowing for the tailoring of absorption coefficient, bandwidth, and field of view. The one‐port absorbers are interpreted using temporal coupled‐mode theory highlighting the dominant role of BICs in the far‐field radiation properties. Through a thorough investigation of BICs from the perspective of lattice symmetry, the radiation features of three BIC modes are unraveled using both multipolar and topological analysis. The versatile radiation capabilities of BICs provide ample freedom to meet specific requirements of absorbers, including tunable bandwidth, stable performance in a large field of view, and multiband absorption using a thin and flexible film without extreme geometric demands. These findings offer a systematic approach to developing optoelectronic devices and demonstrate the significant potential of BICs for optical and photonic applications, which will stimulate further studies on terahertz photonics and metasurfaces.

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Flexible Terahertz Metasurface Absorbers Empowered by Bound States in the Continuum

Xu,

Xue,

Fan

et al. 2024

Advanced Materials

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Transformation of Broadband Absorption to Electromagnetically-Induced Transparency Utilizing Terahertz Metamaterial-Based Phase Change Vanadium Dioxide

Sun,

Xu,

Zhou

et al. 2024

J. Electron. Mater.

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Dynamic colorimetric sensing with all-dielectric metasurfaces governed by bound states in the continuum

Xu,

Yang,

et al. 2025

J. Mater. Chem. C

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Broadband perfect optical absorption enabled by quasi-bound states in the continuum in graphene non-concentric rings

Abstract: Graphene plasmons, possessing a lot of unique optical properties, have been employed to enable a variety of applications in the THz frequency range. Here, we demonstrate bound states in the...

Cited by 8 publications

References 53 publications

Flexible Terahertz Metasurface Absorbers Empowered by Bound States in the Continuum

Flexible Terahertz Metasurface Absorbers Empowered by Bound States in the Continuum

Transformation of Broadband Absorption to Electromagnetically-Induced Transparency Utilizing Terahertz Metamaterial-Based Phase Change Vanadium Dioxide

Dynamic colorimetric sensing with all-dielectric metasurfaces governed by bound states in the continuum

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