Quantum Nonlinear Metasurfaces

Poddubny, Alexander N.; Neshev, Dragomir N.; Sukhorukov, Andrey A.

doi:10.1201/9781351269766-5

Cited by 12 publications

(13 citation statements)

References 79 publications

(140 reference statements)

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“…As a first study, we present an analysis of SPDC with the signal and idler photons being generated at a single BIC. We calculated the SPDC generation rate via the quantum-classical correspondence between SPDC and sum frequency generation (SFG), 11,17,32,33 which is exact in the absence of other nonlinear effects. We performed full SFG numerical simulations and used these results to predict the efficiency of quantum photon-pair generation through SPDC:…”

Section: Single Bicmentioning

confidence: 99%

“…[8][9][10] In addition to classical frequency mixing, nonlinear MSs can also, through Spontaneous Parametric Down-Conversion (SPDC), generate entangled photons with a strong degree of spatial coherence. 11 SPDC in carefully engineered MSs has the potential to drive fundamental advances in the field of ultracompact multi-photon sources 12 that operate at room temperature, which are suitable for integration in end-user devices with applications that include quantum imaging 13 and free-space communications. 14 Traditionally, SPDC is performed in bulk nonlinear crystals with dimensions up to centimeters in length, while integrated waveguides have enabled a reduction of the footprint to millimeter 15 and down to 100 μm length scales.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced generation of nondegenerate photon pairs in nonlinear metasurfaces

et al. 2021

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We predict theoretically a regime of photon-pair generation driven by the interplay of multiple bound states in the continuum resonances in nonlinear metasurfaces. This nondegenerate photon-pair generation is derived from the hyperbolic topology of the transverse phase matching and can enable orders-of-magnitude enhancement of the photon rate and spectral brightness, as compared to the degenerate regime. We show through comprehensive simulations that the entanglement of the photon pairs can be tuned by varying the pump polarization, which can underpin future advances and applications of ultracompact quantum light sources.

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Section: Single Bicmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced generation of nondegenerate photon pairs in nonlinear metasurfaces

et al. 2021

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“…The next natural step are quantum optical metasurfaces (QOMs) for the generation of quantum states of light through nonlinear processes at the nanoscale. 10 , 11 …”

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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“…With the dispersion of the BIC resonance at hand, we perform a quantitative estimation of the quantum photon-pair rate generated through SPDC by employing the quantum-classical correspondence with the inverse process of SPDC: that is, sum-frequency generation (SFG) [12,13,37]. We thus considered two plane waves (the signal and the idler) impinging from air, that generate a SFG signal (corresponding to the pump in the SPDC process) propagating in the substrate (which is the opposite direction of the process sketched in figure 1(a)) and numerically evaluated the efficiency of this process, referred to as η SFG .…”

Section: Enhanced Photon-pair Generationmentioning

confidence: 99%

“…The increased nonlinear efficiency in resonant nanostructures can also facilitate the development of quantum sources based on spontaneous frequency mixing, such as spontaneous parametric down-conversion (SPDC) in media with quadratic nonlinearity [12,13]. Indeed, miniaturization of photon-pair sources below the micron scale is particularly sought after, because of the possibility of working in the absence of the longitudinal phase matching condition, especially in configurations operated at room temperature [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Enhanced generation of angle correlated photon-pairs in nonlinear metasurfaces

et al. 2022

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We reveal that strongly enhanced generation of photon pairs with narrow frequency spectra and sharp angular correlations can be realised through spontaneous parametric down-conversion in metasurfaces. This is facilitated by creating meta-gratings through nano-structuring of nonlinear films of sub-wavelength thickness to support the extended bound state in the continuum resonances, associated with ultra-high Q-factors, at the biphoton wavelengths across a wide range of emission angles. Such spectral features of photons can be beneficial for various applications, including quantum imaging. Our modelling demonstrates a pronounced enhancement, compared to unpatterned films, of the total photon-pair generation rate normalized to the pump power reaching 1.75 KHz/mW, which is robust with respect to the angular bandwidth of the pump, supporting the feasibility of future experimental realisations.

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Quantum Nonlinear Metasurfaces

Cited by 12 publications

References 79 publications

Enhanced generation of nondegenerate photon pairs in nonlinear metasurfaces

Enhanced generation of nondegenerate photon pairs in nonlinear metasurfaces

Photon Pairs from Resonant Metasurfaces

Enhanced generation of angle correlated photon-pairs in nonlinear metasurfaces

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