Broadband visible-near infrared and deep ultraviolet generation by four-wave mixing and high-order stimulated Raman scattering from the hybrid metasurfaces of plasmonic nanoantennae and Raman-active nanoparticles

Rim, Wi‐Song; Kim, Kwang‐Hyon

doi:10.1039/c9cp05186d

Cited by 14 publications

(5 citation statements)

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“…Recently, dielectric metasurfaces have attracted great attention in the community of photonics, since they exhibit strong local field enhancement via Mie resonances [45] and anapole states [46,47] without optical losses unlike plasmonic ones, enabling their important applications such as efficient nonlinear generation. [48][49][50][51] In particular, dielectric chiral metasurfaces exhibit strong circular dichroism. [52,53] Objects with broken mirror symmetry exhibit chiroptical responses, [31] including circular dichroism and photonic spin-Hall effect derived from photonic spin-orbit coupling.…”

Section: Chiral Quasi-bound States In the Continuum Based On Simultaneously Broken In-plane Inversion And Mirror Symmetriesmentioning

confidence: 99%

High‐QChiroptical Resonances by Quasi‐Bound States in the Continuum in Dielectric Metasurfaces with Simultaneously Broken In‐Plane Inversion and Mirror Symmetries

Kim

2021

Advanced Optical Materials

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Most of preceding works for quasi-BICs in all-dielectric metasurfaces dealt with in-plane inversion symmetry-broken photonic systems (see, e.g., refs. [8,14]) rather than mirror symmetry-broken ones.Chiral metamaterials [17][18][19] and metasurfaces, [20][21][22][23][24][25][26][27][28][29] which are characterized by broken mirror symmetry, [30][31][32] have found broad photonic applications for circular dichroic nonlinear generations, [33][34][35][36] spinselective wavefront shaping and manipulating, [37][38][39] and biosensing. [40][41][42] Up to date, a number of results for chiral metasurfaces and metamaterials have been reported, while they dealt with wide bandwidth circular dichroism. For photonic applications, circular dichroism accompanying with narrow bandwidth and high quality factor is required, for example, for chiral sensing with high spectral resolution, simultaneous spectral, and spin selective wavefront shaping and secure optical communications, [43] efficient circular dichroic nonlinear generations, and circularly polarized lasing with low threshold. Employing quasi-BIC for mirror symmetry-broken systems might be a potential solution. Recent reports for metasurfaces exhibiting chiral quasi-BIC, however, have proposed to use double layered structure [43] or to introduce out-of-plane perturbations for obtaining high-Q chiroptical responses, [44] requiring complicated fabricating processes.In this work, we numerically show that chiral quasi-BIC with high Q-factor can be obtained by simultaneously breaking the in-plane inversion and mirror symmetries in dielectric metasurfaces. Taking metasurfaces with unit cells containing dielectric meta-atoms of different shapes as examples, we reveal that strong circular dichroism can be obtained for such a simultaneous in-plane symmetry breaking, sustaining high Q-factor and highly enhanced local field. When the in-plane inversion and mirror asymmetries gradually increase, the circular dichroism for the transmission and reflection of the metasurface increases and the Q-factor decreases. Dielectric metasurfaces with mirror symmetry supporting symmetry-protected BIC ubiquitously exhibit chiral quasi-BIC by simultaneously broken in-plane inversion and mirror symmetries. The results presented in this work can find important photonic applications such as chiral biosensing with high spectral resolution, Bound states in the continuum (BIC) have recently attracted great attention in photonics. Metasurfaces with broken inversion symmetry exhibit high-Q resonances via quasi-BIC, enabling low threshold lasing, sensing, and efficient nonlinear generation. Recently, chiral BICs have been investigated by using double layer structure or out-of-plane perturbation, requiring complicated fabrication processes. This work presents chiral quasi-BIC by simultaneously breaking the in-plane inversion and mirror symmetries in dielectric metasurfaces. For such a simultaneous symmetry breaking, the metasurfaces exhibit quasi-BIC with strong chirality, resulting in near-unity circular dich...

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Section: Chiral Quasi-bound States In the Continuum Based On Simultaneously Broken In-plane Inversion And Mirror Symmetriesmentioning

confidence: 99%

High‐QChiroptical Resonances by Quasi‐Bound States in the Continuum in Dielectric Metasurfaces with Simultaneously Broken In‐Plane Inversion and Mirror Symmetries

Kim

2021

Advanced Optical Materials

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“…[21] The above metamaterials and metasurfaces can be made of both plasmonic and dielectric materials, the latter of which are preferable due to lower optical losses and stronger CD. [9,10] Over the past decade, nonlinear nanostructures and metasurfaces [22] have extensively investigated for diverse practical applications, including efficient harmonic generation, [23][24][25][26][27][28] four-wave mixing, [29] high-order stimulated Raman scattering, [30] and nonlinear beam shaping. [31] In particular, nonlinear optical processes in chiral metasurfaces [32][33][34][35][36][37][38][39] have great importance for nonlinear chiral sensing and nonlinear metasurface holography.…”

Section: Introductionmentioning

confidence: 99%

Dielectric Chiral Metasurfaces for Second‐Harmonic Generation with Strong Circular Dichroism

Kim

2020

Annalen der Physik

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Dielectric chiral metasurfaces can generate harmonic waves with high efficiency and strong circular dichroism (CD), when they are supported by metallic substrates. Numerical results show that the second-harmonic generation (SHG) efficiency of about 10 −3 % for a peak pump intensity of about 5 GW cm −2 can be achieved in the blue-UV, and the SHG CD reaches up to about 1.8, from a metasurface of Z-shaped lithium niobate nanoantenna array supported by gold substrate. Highly efficient and strong circular dichroic nonlinear responses are attributed to the plasmon-assisted local field enhancement in the dielectric chiral nanoantennae adjacent to the metallic substrate.

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“…Four-wave mixing (FWM) is a third-order nonlinear effect where two or three different incident photons are mixed together to generate a new photon at a different frequency. The development of nanophotonics has served as an increasingly promising platform for enhancing the FWM process [29][30][31][32][33][34][35][36][37][38]. For the three-photon case, i.e.…”

Section: Introductionmentioning

confidence: 99%

Enhanced four-wave mixing from multi-resonant silicon dimer-hole membrane metasurfaces

Camacho‐Morales

Aoni

et al. 2022

New J. Phys.

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Tailoring optically resonant features in dielectric metasurfaces unveils a robust scheme to control electromagnetic near fields of light and thus to boost the nanoscale nonlinear light-matter interactions. Membrane metasurfaces offer unique possibilities for supporting multipolar resonances and meanwhile maintaining high mode volume for enhancing nonlinear frequency conversion. Here we design a silicon membrane metasurface consisting of dimer airy holes, as a versatile platform for generating four-wave mixing (FWM). We show that such a metasurface exhibits a multi-resonant feature, including a quasi bound state in the continuum (BIC) generated by the collective toroidal dipole mode excited in the designed subdiffractive periodic system. We show that via employing the BIC mode in the short-wave infrared (SWIR), together with other resonant enhanced electric near fields in near-infrared (NIR) region, simultaneously, one can convert invisible SWIR light to visible light radiation with high efficiency, via FWM. We experimentally demonstrated a significant four-wave mixing emission enhancement from our metasurface, which leads to a conversion efficiency of 1.2×10-6 using pump and signal beam peak intensities as low as 0.24 GW/cm-2 and 0.14 GW/cm-2, respectively. Our results open new routes for enhancing nonlinear efficiencies for up-conversion processes.

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Broadband visible-near infrared and deep ultraviolet generation by four-wave mixing and high-order stimulated Raman scattering from the hybrid metasurfaces of plasmonic nanoantennae and Raman-active nanoparticles

Abstract: Broadband visible-near infrared and deep ultraviolet generation from Raman-active hybrid metasurfaces by two-color pumping.

Cited by 14 publications

References 34 publications

High‐QChiroptical Resonances by Quasi‐Bound States in the Continuum in Dielectric Metasurfaces with Simultaneously Broken In‐Plane Inversion and Mirror Symmetries

High‐QChiroptical Resonances by Quasi‐Bound States in the Continuum in Dielectric Metasurfaces with Simultaneously Broken In‐Plane Inversion and Mirror Symmetries

Dielectric Chiral Metasurfaces for Second‐Harmonic Generation with Strong Circular Dichroism

Enhanced four-wave mixing from multi-resonant silicon dimer-hole membrane metasurfaces

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