Resonant chiral effects in nonlinear dielectric metasurfaces

Koshelev, Kirill; Tang, Yiming; Hu, Zixian; Kravchenko, Ivan I.; Li, Guixin; Kivshar, Yuri

doi:10.48550/arxiv.2202.12041

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…[29,30] Recently, chiroptical nanostructures mediated by BICs have been proposed, demonstrating perfect chirality and ultrahigh Q-factors. [31][32][33][34] Here, we propose a metasurface to achieve dual-band chiral quasi-BIC modes and explore its nonlinear chiral and chiralsensing application prospects. Based on the Si-based two-layer distorted structure, the theoretical THG conversion efficiency can reach the order of 10 −4 , and the THG-CD can reach almost unity for two bands by combining the quasi-BICs with chirality.…”

Section: Introductionmentioning

confidence: 99%

Dual‐Band Chiral Nonlinear Metasurface Supported by Quasibound States in the Continuum

et al. 2022

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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.

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Section: Introductionmentioning

confidence: 99%

Dual‐Band Chiral Nonlinear Metasurface Supported by Quasibound States in the Continuum

et al. 2022

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Nonlinear photonics with metasurfaces

Vabishchevich

Kivshar²

2023

Photon. Res.

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Nonlinear optics is a well-established field of research that traditionally relies on the interaction of light with macroscopic nonlinear media over distances significantly greater than the wavelength of light. However, the recently emerged field of optical metasurfaces provides a novel platform for studying nonlinear phenomena in planar geometries. Nonlinear optical metasurfaces introduce new functionalities to the field of nonlinear optics extending them beyond perturbative regimes of harmonic generation and parametric frequency conversion, being driven by mode-matching, resonances, and relaxed phase-matching conditions. Here we review the very recent advances in the rapidly developing field of nonlinear metasurface photonics, emphasizing multi-frequency and cascading effects, asymmetric and chiral frequency conversion, nonperturbative nonlinear regimes, and nonlinear quantum photonics, empowered by the physics of Mie resonances and optical bound states in the continuum.

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Resonant chiral effects in nonlinear dielectric metasurfaces

Cited by 2 publications

References 18 publications

Dual‐Band Chiral Nonlinear Metasurface Supported by Quasibound States in the Continuum

Dual‐Band Chiral Nonlinear Metasurface Supported by Quasibound States in the Continuum

Nonlinear photonics with metasurfaces

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