Resonant dielectric metasurfaces in strong optical fields

Zubyuk, Varvara V.; Carletti, Luca; Shcherbakov, Maxim R.; Kruk, Sergey

doi:10.1063/5.0048937

Cited by 33 publications

(16 citation statements)

References 151 publications

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“…Furthermore, metasurfaces feature a flat, areal nature, and while having nanoscale thickness, they can reach macroscopic dimensions in the plane. The areal nature and enhanced complexity of metasurfaces compared to individual scatterers can unlock a flurry of additional functionalities and applications, as briefly discussed above (see, e.g., Section 1.2 and described in detail in several recent review articles [197][198][199] ).…”

Section: Hybrid Metasurfacesmentioning

confidence: 99%

Applications of Hybrid Metal‐Dielectric Nanostructures: State of the Art

Barreda

Vitale

Minovich

et al. 2022

Advanced Photonics Research

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Enhancing the light‐matter interactions is important for many different applications like sensing, surface enhanced spectroscopies, solar energy harvesting, and for quantum effects such as nonlinear frequency generation or spontaneous and stimulated emission. Hybrid metal‐dielectric nanostructures have shown extraordinary performance in this respect, demonstrating their superiority with respect to bare metallic or high refractive index dielectric nanostructures. Such hybrid nanostructures can combine the best of two worlds: strong confinement of the electromagnetic energy by metallic structures and high scattering directivity and low losses of the dielectric ones. In this review, following a general overview of the properties of metal‐dielectric nanostructures, some of their most relevant applications including directional scattering, sensing, surface enhanced Raman spectroscopy, absorption enhancement, fluorescence and quantum dot emission enhancement, nonlinear effects, as well as lasing, are summarized.

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Section: Hybrid Metasurfacesmentioning

confidence: 99%

Applications of Hybrid Metal‐Dielectric Nanostructures: State of the Art

Barreda

Vitale

Minovich

et al. 2022

Advanced Photonics Research

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“…Nonlinear nanophotonics was originally dominated by lower-order processes (second and third orders) [2][3][4][5]. Recently, higher-order nonlinearities have entered the realm of nanostructured solids [6][7][8][9][10]. High harmonic generation (HHG) in both subwavelength gratings and metasurfaces is being actively explored.…”

Section: Introductionmentioning

confidence: 99%

Observation of Seventh Harmonic Generation from a Subwavelength Dielectric Resonator

Zalogina¹,

Carletti²,

Tripathi³

et al. 2022

Preprint

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Generation of higher optical harmonics has recently entered the realm of subwavelength optics, and it has been achieved in gratings and metasurfaces. Here, we demonstrate the source of highharmonic generation scaled down to a subwavelength dielectric resonator. We study fifth and seventh optical harmonics generated from an AlGaAs resonator designed to support a bound state in the continuum. Higher optical harmonics can serve as a source of radiation in unconventional spectral ranges, such as the extreme-UV, and our work paves the way to the light sources with subwavelength volumes.I.

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“…All-dielectric nanostructures, supporting individual Mie or collective resonances, can boost harmonic generation up to record conversion efficiencies in ultrashort laser-matter interactions. [1][2][3][4][5][6][7][8] One of the crucial advantages is a relatively high damage threshold of such materials, in comparison with plasmonic counterparts or unstructured samples. Nevertheless, the limitations due to free carrier absorption losses and material damage are still relevant in pursuit of the optimal laser parameters and geometries for record harmonic enhancement and while paving the way from perturbative to non-perturbative regimes in nonlinear optics.…”

Section: Introductionmentioning

confidence: 99%

Trade‐Off between Second‐ and Third‐Order Nonlinearities, Ultrafast Free Carrier Absorption and Material Damage in Silicon Nanoparticles

Rudenko

Han

Moloney

2022

Advanced Optical Materials

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that different mechanisms are involved in SHG from non-centrosymmetric and centrosymmetric semiconductor materials. The latter ones inherit the inversion symmetry that forbids electric dipole secondorder susceptibility. Nevertheless, the symmetry is broken by bulk quadrupole and surface dipole contributions. [17,18] In order to describe the nonlinear optical response of centrosymmetric materials such as silicon (Si), a phenomenological model was proposed by Bloembergen et al. [9] and applied to specific nanostructures in the recent studies. [3,19] In the pioneering work, [9] the correspondence between pheno menological and a hydrodynamic model for free electrons, commonly applied to describe second-order nonlinear response from metals, [13] was demonstrated. These two approaches, originally designed for bound and free electrons and coupled to Maxwell equations by the nonlinear polarization, form the basis to describe the perturbative nonlinear response of arbitrary nanostructures.Upon ultrashort laser excitation of all-dielectric materials, optical properties swiftly change due to photo-ionization processes, while free carrier absorption may lead to the local material damage. On the one hand, these effects are commonly considered as the limiting factors for the operating frequency conversion nanodevices. [1,2,[20][21][22][23] On the other hand, inhomogeneous free carriers can serve as an additional source for symmetry breaking [24,25] and for high-order harmonics generation in non-perturbative regimes, [7,8,26,27] and participate in ultrafast self-action, all-optical switching, and modulation at the nanoscale. [20,[28][29][30][31][32] While the applicability of the perturbative approaches is limited to describe weak intensity regimes, the extended hydrodynamic model for electron-hole plasma kinetics and electron-ion transfer gives a reliable estimate for the inhomogeneous absorption and heating processes inside the laser-excited nanostructures and describes the non-perturbative mechanism of harmonic generation due to direct electron transitions from valence to conduction band. To date, a self-consistent approach, considering both nonlinear sources and laser-induced electron-hole dynamics has not been proposed and applied in the context of SHG and THG.In the current work, a multi-physical approach is developed in order to explore the natural material limitations for nonlinear conversion efficiency achievable by ultrashort laser irradiation of Reaching the optimal second-and third-order nonlinear conversion efficiencies while avoiding undesirable free carrier absorption losses and material damage in ultrashort laser-excited nanostructures is a challenging obstacle in all-dielectric ultrafast nanophotonics. In order to elucidate the main aspects of this problem, a multi-physical model is developed, coupling nonlinear Maxwell equations supplied by surface and bulk nonlinearities with free carrier hydrodynamic equations for electron-hole plasma kinetics and electron-ion transfer for silicon. The maximum feasible effic...

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Resonant dielectric metasurfaces in strong optical fields

Cited by 33 publications

References 151 publications

Applications of Hybrid Metal‐Dielectric Nanostructures: State of the Art

Applications of Hybrid Metal‐Dielectric Nanostructures: State of the Art

Observation of Seventh Harmonic Generation from a Subwavelength Dielectric Resonator

Trade‐Off between Second‐ and Third‐Order Nonlinearities, Ultrafast Free Carrier Absorption and Material Damage in Silicon Nanoparticles

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