Nonlinear optics with resonant metasurfaces

Pertsch, Thomas; Kivshar, Yuri S.

doi:10.1557/mrs.2020.65

Cited by 75 publications

(42 citation statements)

References 92 publications

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“…Especially all-dielectric high-χ (2) metasurfaces 20 are a favorable platform for SPDC, because of their high damage threshold. Various resonance effects, such as Mie-type 21 , 22 or Fano-type 23 resonances and bound states in the continuum, 24 have been shown to enhance SHG efficiency by several orders of magnitude.…”

Section: Introductionmentioning

confidence: 99%

Photon Pairs from Resonant Metasurfaces

et al. 2021

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All-dielectric optical metasurfaces are a workhorse in nano-optics, because of both their ability to manipulate light in different degrees of freedom and their excellent performance at light frequency conversion. Here, we demonstrate first-time generation of photon pairs via spontaneous parametric-down conversion in lithium niobate quantum optical metasurfaces with electric and magnetic Mie-like resonances at various wavelengths. By engineering the quantum optical metasurface, we tailor the photon-pair spectrum in a controlled way. Within a narrow bandwidth around the resonance, the rate of pair production is enhanced up to 2 orders of magnitude, compared to an unpatterned film of the same thickness and material. These results enable flat-optics sources of entangled photons—a new promising platform for quantum optics experiments.

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Section: Introductionmentioning

confidence: 99%

Photon Pairs from Resonant Metasurfaces

et al. 2021

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“…In recent years, 2D planar arrays consisting of resonant dipolar/multipolar particles have attracted increased attention [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ], lately including magnetic dipole resonances to account for the lowest-order Mie resonances of high-refractive index particles [ 5 , 21 , 22 , 23 , 24 , 25 , 26 ]. The renewed interest in such planar arrays stems from their application as infinitely thin optical devices performing various functionalities [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ], especially in nanophotonics, known as metasurfaces/metagratings in the non-diffractive/diffractive spectral regime, respectively.…”

Section: Introductionmentioning

confidence: 99%

Near-Field Excitation of Bound States in the Continuum in All-Dielectric Metasurfaces through a Coupled Electric/Magnetic Dipole Model

Abujetas

Sánchez‐Gil

2021

Nanomaterials

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Resonant optical modes arising in all-dielectric metasurfaces have attracted much attention in recent years, especially when so-called bound states in the continuum (BICs) with diverging lifetimes are supported. With the aim of studying theoretically the emergence of BICs, we extend a coupled electric and magnetic dipole analytical formulation to deal with the proper metasurface Green function for the infinite lattice. Thereby, we show how to excite metasurface BICs, being able to address their near-field pattern through point-source excitation and their local density of states. We apply this formulation to fully characterize symmetry-protected BICs arising in all-dielectric metasurfaces made of Si nanospheres, revealing their near-field pattern and local density of states, and, thus, the mechanisms precluding their radiation into the continuum. This formulation provides, in turn, an insightful and fast tool to characterize BICs (and any other leaky/guided mode) near fields in all-dielectric (and also plasmonic) metasurfaces, which might be especially useful for the design of planar nanophotonic devices based on such resonant modes.

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“…These features have obvious applications in optical steganography and cryptography, where they involve techniques that conceal/hide a message or information for security purposes. 87,102,103,105 Nonlinear and quantum metasurfaces Using metasurfaces with subwavelength control over polarization enables control of nonlinear optical processes, such as second-harmonic and third-harmonic generation 106 (as discussed in the Pertsch and Kivshar article in this issue 107 ) and four-wave mixing. 108 Symmetry selection rules in harmonic generation have been observed in nonlinear optical chirality using meta-atoms, or the artificial atoms constituting the metasurfaces.…”

Section: Metasurfaces For Display Applicationsmentioning

confidence: 99%