Superchiral Light Emerging from Bound States in the Continuum in Metasurfaces of Si Nanorod Dimers

Pura, Jose Luis; Castillo López de Larrinzar, Beatriz; Liang, Minpeng; García-Martín, Antonio; Gómez Rivas, Jaime; Sánchez-Gil, José A.

doi:10.1021/acsphotonics.4c00938

ACS Photonics

2024

DOI: 10.1021/acsphotonics.4c00938

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Superchiral Light Emerging from Bound States in the Continuum in Metasurfaces of Si Nanorod Dimers

Jose Luis Pura,

Beatriz Castillo López de Larrinzar,

Minpeng Liang

et al.

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High-sensitivity terahertz chiroptical sensing enabled by multi-dimensionally tunable all-dielectric metasurface with dual quasi-bound states in the continuum

Xie,

Sun,

Guan

et al. 2024

Opt. Express

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Chiral all-dielectric metasurfaces serve as an ideal platform for achieving high-Q chiral optical resonances and narrowband circular dichroism (CD), significantly enhancing sensing capabilities. We propose a single-layer metasurface that realizes dual q-BICs by introducing a single asymmetric parameter, which allows for greater selectivity in chiral responses without increasing structural complexity or requiring external stimuli. Moreover, the method of inducing dual-band chiral q-BICs to achieve CD is highly applicable to sensing, providing not only a broader spectral range for chiral sensing but also outstanding environmental and trace sensing capabilities. The sensitivity reaches up to 372.8 GHz/RIU and 23.6 GHz/µm, with figures of merit (FOM) of 297 RIU−1. This offers a multifunctional approach for multi-band spin-selective transmission and chiral biosensing.

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High-sensitivity terahertz chiroptical sensing enabled by multi-dimensionally tunable all-dielectric metasurface with dual quasi-bound states in the continuum

Xie,

Sun,

Guan

et al. 2024

Opt. Express

View full text Add to dashboard Cite

show abstract

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Superchiral Light Emerging from Bound States in the Continuum in Metasurfaces of Si Nanorod Dimers

Cited by 1 publication

References 69 publications

High-sensitivity terahertz chiroptical sensing enabled by multi-dimensionally tunable all-dielectric metasurface with dual quasi-bound states in the continuum

High-sensitivity terahertz chiroptical sensing enabled by multi-dimensionally tunable all-dielectric metasurface with dual quasi-bound states in the continuum

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