High-harmonic generation from a subwavelength dielectric resonator

Anastasiia Zalogina; Luca Carletti; Anton Rudenko; Jerome V. Moloney; Aditya Tripathi; Hoo Cheol Lee; Ilya Shadrivov; Hong Gyu Park; Yuri Kivshar; Sergey S. Kruk

doi:10.1126/SCIADV.ADG2655

High-harmonic generation from a subwavelength dielectric resonator

Anastasiia Zalogina, Luca Carletti, Anton Rudenko, Jerome V. Moloney, Aditya Tripathi, Hoo Cheol Lee, Ilya Shadrivov, Hong Gyu Park, Yuri Kivshar, Sergey S. Kruk

Department of Physics

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

20 Citations (Scopus)

Abstract

Higher-order optical harmonics entered the realm of nanostructured solids being observed recently in optical gratings and metasurfaces with a subwavelength thickness. Structuring materials at the subwavelength scale allows us toresonantly enhance the efficiency of nonlinear processes and reduce the size of high-harmonic sources. We report the observation of up to a seventh harmonic generated from a single subwavelength resonator made of AlGaAs material. This process is enabled by careful engineering of the resonator geometry for supporting an optical mode associated with a quasi-bound state in the continuum in the mid-infrared spectral range at around λ = 3.7 μm pump wavelength. The resonator volume measures ~0.1 λ³. The resonant modes are excited with an azimuthally polarized tightly focused beam. We evaluate the contributions of perturbative and nonperturbative nonlinearities to the harmonic generation process. Our work proves the possibility to miniaturize solid-state sources of high harmonics to the subwavelength volumes.

Original language	English
Article number	eadg2655
Journal	Science Advances
Volume	9
Issue number	17
DOIs	https://doi.org/10.1126/SCIADV.ADG2655
Publication status	Published - 2023 Apr

Bibliographical note

Funding Information:
Y.K. thanks D. Reis for highly insightful and stimulating discussions of the results. This work was supported by Australian Research Council (DE210100679 and DP210101292), Samsung Research Funding and Incubation Centre of Samsung Electronics (SRFC-MA2001-01), Air Force Office of Scientific Research (FA9550-19-1-0032 and FA9550-21-1-0463), the International Technology Center Indo-Pacific (ITC IPAC) via Army Research Office (FA520921P0034), and the National Research Foundation of Korea (NRF) funded by the Korean government (2021R1A2C3006781).

Publisher Copyright:
Copyright © 2023 The Authors.

ASJC Scopus subject areas

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title = "High-harmonic generation from a subwavelength dielectric resonator",

abstract = "Higher-order optical harmonics entered the realm of nanostructured solids being observed recently in optical gratings and metasurfaces with a subwavelength thickness. Structuring materials at the subwavelength scale allows us toresonantly enhance the efficiency of nonlinear processes and reduce the size of high-harmonic sources. We report the observation of up to a seventh harmonic generated from a single subwavelength resonator made of AlGaAs material. This process is enabled by careful engineering of the resonator geometry for supporting an optical mode associated with a quasi-bound state in the continuum in the mid-infrared spectral range at around λ = 3.7 μm pump wavelength. The resonator volume measures ~0.1 λ3. The resonant modes are excited with an azimuthally polarized tightly focused beam. We evaluate the contributions of perturbative and nonperturbative nonlinearities to the harmonic generation process. Our work proves the possibility to miniaturize solid-state sources of high harmonics to the subwavelength volumes.",

author = "Anastasiia Zalogina and Luca Carletti and Anton Rudenko and Moloney, {Jerome V.} and Aditya Tripathi and Lee, {Hoo Cheol} and Ilya Shadrivov and Park, {Hong Gyu} and Yuri Kivshar and Kruk, {Sergey S.}",

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AU - Carletti, Luca

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AU - Lee, Hoo Cheol

AU - Shadrivov, Ilya

AU - Park, Hong Gyu

AU - Kivshar, Yuri

AU - Kruk, Sergey S.

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High-harmonic generation from a subwavelength dielectric resonator

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