Efficient non-perturbative high-harmonic generation from nonlinear metasurfaces with low pump intensity

An, Jong‐Kwan; Kim, Kwang‐Hyon

doi:10.1016/j.optlastec.2020.106702

Cited by 17 publications

(5 citation statements)

References 64 publications

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“…Theoretically, a ZnO nanodisk metasurface on gold has been proposed for HHG up to the 21st harmonic when pumping at 1550 nm, with conversion efficiencies running from 10 −12 (21st harmonic) to 10 −7 (9th harmonic) at ∼70 GW/cm 2 . 169…”

Section: ■ High Harmonic Generationmentioning

confidence: 99%

Nonlinear Dielectric Nanoantennas and Metasurfaces: Frequency Conversion and Wavefront Control

Grinblat

2021

ACS Photonics

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High-index dielectric nanostructures can support optical resonances of electric and magnetic character with ultralow linear absorption. In contrast to plasmonics, they can be engineered to confine electromagnetic fields inside the resonator, amplifying intrinsic nonlinearities of the dielectric. In this Review I examine the ability of dielectric nanoantennas and metasurfaces for efficient harmonic generation and wave-mixing processes, as well as nonlinear wavefront manipulation of the incident and radiated light. A detailed comparison is made between the many nanoscopic dielectric configurations reported in the literature, evaluating the influence of the material, crystal symmetry, structure geometry, and the different resonances involved (electric and magnetic Mie modes, Fano resonances, and quasi-nonradiative states, including anapoles and quasi-bound states in the continuum). The nonlinear performance of the nanosystems is analyzed, with emphasis on frequency conversion efficiency and emission directionality control, also discussing recent advances in nonlinear imaging, nonlinear holography, and all-optical switching. The role of topology in nonlinear nanophotonics is reviewed in the end, and potential future directions in the field are laid out.

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Section: ■ High Harmonic Generationmentioning

confidence: 99%

Nonlinear Dielectric Nanoantennas and Metasurfaces: Frequency Conversion and Wavefront Control

Grinblat

2021

ACS Photonics

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“…Only recently that HHG from solids has been demonstrated (10)(11)(12)(13), opening a pathway to higher-order nonlinearities in nanophotonics. HHG has been observed in twodimensional (2D) layouts of subwavelength elements, such as metasurfaces (14)(15)(16)(17)(18)(19)(20)(21). However, the sizes of such structures remained large in two lateral dimensions.…”

Section: Introductionmentioning

confidence: 99%

High-harmonic generation from a subwavelength dielectric resonator

et al. 2023

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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 λ 3 . 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.

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“…8). Ensuring high index contrast between the nanoparticles and substrates 8 or using metallic substrates [9][10][11] prevent the mode leakage and support strong eld connement even with the lower-index materials.…”

Section: Introductionmentioning

confidence: 99%

Quasi-bound states in the continuum with high Q-factors in metasurfaces of lower-index dielectrics supported by metallic substrates

Kim

2022

RSC Adv.

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Efficient non-perturbative high-harmonic generation from nonlinear metasurfaces with low pump intensity

Cited by 17 publications

References 64 publications

Nonlinear Dielectric Nanoantennas and Metasurfaces: Frequency Conversion and Wavefront Control

Nonlinear Dielectric Nanoantennas and Metasurfaces: Frequency Conversion and Wavefront Control

High-harmonic generation from a subwavelength dielectric resonator

Quasi-bound states in the continuum with high Q-factors in metasurfaces of lower-index dielectrics supported by metallic substrates

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