Resonant Chiral Effects in Nonlinear Dielectric Metasurfaces

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

doi:10.1021/acsphotonics.2c01926

Resonant Chiral Effects in Nonlinear Dielectric Metasurfaces

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

Nanofabrication Research Laboratory

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

We study the resonant enhancement of linear and nonlinear chiroptical effects in planar silicon metasurfaces with an in-plane asymmetry supporting multipolar Mie resonances and quasi-bound states in the continuum (quasi-BICs). We demonstrate theoretically and observe in experiment the pronounced linear circular dichroism at the quasi-BIC resonances originating from the interaction of modes with the substrate. We further find that both local field enhancement and third-harmonic signal are large for Mie resonances and some quasi-BIC modes due to the critical coupling. We demonstrate experimentally a strong nonlinear chiroptical response associated with high efficiency of the third-harmonic generation and large nonlinear circular dichroism varying from +0.918 ± 0.049 to −0.771 ± 0.004 for the samples with different asymmetries. We reveal the nonreciprocal nature of nonlinear chirality governed by the microscopic symmetry of nonlinearities and macroscopic symmetries of the meta-atom and metasurface lattice. We believe our results suggest a general strategy for engineering nonlinear chiroptical response in dielectric resonant metasurfaces.

Original language	English
Pages (from-to)	298-306
Number of pages	9
Journal	ACS Photonics
Volume	10
Issue number	1
DOIs	https://doi.org/10.1021/acsphotonics.2c01926
State	Published - Jan 18 2023

Funding

The authors acknowledge numerous highlighting comments from M. Gorkunov and V. Valev and the help of Ms. Mingke Jin with the SEM measurements. The sample fabrication was conducted as part of a user project at the Center for Nanophase Materials Sciences (CNMS), which is a U.S. Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory. G.L. was supported by National Natural Science Foundation of China (grants 91950114 and 12161141010). Y.K. acknowledges support from the Australian Research Council (grant DP210101292), as well as the International Technology Center Indo-Pacific (ITC IPAC) and Army Research Office under Contract No. FA520921P0034.

Keywords

Mie resonances
bound states in the continuum
chirality
dielectric metasurfaces
nonlinear metasurfaces
third-harmonic generation

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10.1021/acsphotonics.2c01926

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title = "Resonant Chiral Effects in Nonlinear Dielectric Metasurfaces",

abstract = "We study the resonant enhancement of linear and nonlinear chiroptical effects in planar silicon metasurfaces with an in-plane asymmetry supporting multipolar Mie resonances and quasi-bound states in the continuum (quasi-BICs). We demonstrate theoretically and observe in experiment the pronounced linear circular dichroism at the quasi-BIC resonances originating from the interaction of modes with the substrate. We further find that both local field enhancement and third-harmonic signal are large for Mie resonances and some quasi-BIC modes due to the critical coupling. We demonstrate experimentally a strong nonlinear chiroptical response associated with high efficiency of the third-harmonic generation and large nonlinear circular dichroism varying from +0.918 ± 0.049 to −0.771 ± 0.004 for the samples with different asymmetries. We reveal the nonreciprocal nature of nonlinear chirality governed by the microscopic symmetry of nonlinearities and macroscopic symmetries of the meta-atom and metasurface lattice. We believe our results suggest a general strategy for engineering nonlinear chiroptical response in dielectric resonant metasurfaces.",

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author = "Kirill Koshelev and Yutao Tang and Zixian Hu and Kravchenko, {Ivan I.} and Guixin Li and Yuri Kivshar",

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doi = "10.1021/acsphotonics.2c01926",

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AU - Koshelev, Kirill

AU - Tang, Yutao

AU - Hu, Zixian

AU - Kravchenko, Ivan I.

AU - Li, Guixin

AU - Kivshar, Yuri

PY - 2023/1/18

Y1 - 2023/1/18

N2 - We study the resonant enhancement of linear and nonlinear chiroptical effects in planar silicon metasurfaces with an in-plane asymmetry supporting multipolar Mie resonances and quasi-bound states in the continuum (quasi-BICs). We demonstrate theoretically and observe in experiment the pronounced linear circular dichroism at the quasi-BIC resonances originating from the interaction of modes with the substrate. We further find that both local field enhancement and third-harmonic signal are large for Mie resonances and some quasi-BIC modes due to the critical coupling. We demonstrate experimentally a strong nonlinear chiroptical response associated with high efficiency of the third-harmonic generation and large nonlinear circular dichroism varying from +0.918 ± 0.049 to −0.771 ± 0.004 for the samples with different asymmetries. We reveal the nonreciprocal nature of nonlinear chirality governed by the microscopic symmetry of nonlinearities and macroscopic symmetries of the meta-atom and metasurface lattice. We believe our results suggest a general strategy for engineering nonlinear chiroptical response in dielectric resonant metasurfaces.

AB - We study the resonant enhancement of linear and nonlinear chiroptical effects in planar silicon metasurfaces with an in-plane asymmetry supporting multipolar Mie resonances and quasi-bound states in the continuum (quasi-BICs). We demonstrate theoretically and observe in experiment the pronounced linear circular dichroism at the quasi-BIC resonances originating from the interaction of modes with the substrate. We further find that both local field enhancement and third-harmonic signal are large for Mie resonances and some quasi-BIC modes due to the critical coupling. We demonstrate experimentally a strong nonlinear chiroptical response associated with high efficiency of the third-harmonic generation and large nonlinear circular dichroism varying from +0.918 ± 0.049 to −0.771 ± 0.004 for the samples with different asymmetries. We reveal the nonreciprocal nature of nonlinear chirality governed by the microscopic symmetry of nonlinearities and macroscopic symmetries of the meta-atom and metasurface lattice. We believe our results suggest a general strategy for engineering nonlinear chiroptical response in dielectric resonant metasurfaces.

KW - Mie resonances

KW - bound states in the continuum

KW - chirality

KW - dielectric metasurfaces

KW - nonlinear metasurfaces

KW - third-harmonic generation

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Resonant Chiral Effects in Nonlinear Dielectric Metasurfaces

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