Efficient single-photon pair generation by spontaneous parametric down-conversion in nonlinear plasmonic metasurfaces

Jin, Bo; Mishra, Dhananjay; Argyropoulos, Christos

doi:10.1039/d1nr05379e

Cited by 32 publications

(25 citation statements)

References 82 publications

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“…42 Here, resonant enhancement of the photonic density of states led to higher generation rates when degenerate signal and idler wavelengths were close to the grating resonance, as shown in Figure 5d. Furthermore, silver nanogratings on thinfilm LiNbO 3 sustaining plasmon-polariton resonances at different wavelengths were numerically shown to mediate nondegenerate SPDC, 163 but the metal-induced losses decreased the achievable conversion efficiency (see row 6 in Table 3). Metasurfaces from nanostructured thin-film LiNbO 3 were also used for photon-pair generation (see Figure 5e).…”

Section: Engineering Spontaneous Parametric Down-conversionmentioning

confidence: 99%

Lithium Niobate Meta-Optics

et al. 2022

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The rapid development of optical metasurfaces, 2D ensembles of engineered nanostructures, is presently underpinning a steady drive toward the miniaturization of many optical functionalities and devices. The list of material platforms for optical metasurfaces is rapidly expanding as, over the past few years, we have witnessed a surge in establishing meta-optical elements from high-index, highly transparent materials with strong nonlinear and electro-optic properties. In particular, crystalline lithium niobate (LiNbO 3 ), already a prime material for integrated photonics, has shown great promise for novel meta-optical components, thanks to its large electro-optical coefficient and secondorder nonlinear response and its broad transparency window ranging from the visible to the mid-infrared. Recent advances in nanofabrication technology have indeed marked a new milestone in the miniaturization of LiNbO 3 platforms, hence enabling the first demonstrations of LiNbO 3 -based metasurfaces. These seminal works set a steppingstone toward the realization of ultrathin monolithic nonlinear light sources, efficient quantum sources of correlated photon pairs, as well as electro-optical modulators. Here, we review these recent advances by providing a perspective on their potential applications and examining the possible setbacks and limitations of these emerging technologies.

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Section: Engineering Spontaneous Parametric Down-conversionmentioning

confidence: 99%

Lithium Niobate Meta-Optics

et al. 2022

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“…With high second-order susceptibility, LN also plays an essential role in improving the efficiency of the nonlinear effect. Jin et al 160 used the LN and plasmonic configuration to generate highly directional entangled photon pairs. They simulated a Metal−Insulator−Metal structure, as shown in Figure 11d.…”

Section: ■ Nonclassical Metasurfacementioning

confidence: 99%

Section: Nonclassical Metasurfacementioning

confidence: 99%

Emerging Trend in Unconventional Metasurfaces: From Nonlinear, Non-Hermitian to Nonclassical Metasurfaces

Fan

Liang

et al. 2022

ACS Photonics

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Metasurfaces, benefiting from the flexibility in engineering the resonance, near-field, symmetry, and scattering properties of individual building blocks, are promising not only for a wide range of practical applications in the classical linear optical regime, but also facilitate research into new unconventional areas. Very recently, we have been witnessing the second quantum revolution in which quantum information processing and computation are becoming a reality. In this review, we will focus on some of the emerging developments of metasurfaces that work in the nonlinear, non-Hermitian, nonclassical, or quantum regime. We review some of the common principles shared by the development of these metasurfaces, including local field enhancement and the consideration of structure, lattice, and time-reversal symmetries.

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“…An enhancement of SPDC through localized Mie-type optical resonances (16) in nanoantennas (17) and metasurfaces (18) was experimentally demonstrated. Recent theoretical studies (19)(20)(21) suggested that using metasurfaces with nonlocal lattice resonances (22,23) can further boost the SPDC efficiency, yet the realization of this concept remained outstanding.…”

Section: Introductionmentioning

confidence: 99%

Spatially entangled photon pairs from lithium niobate nonlocal metasurfaces

Zhang

Parry

et al. 2022

Sci. Adv.

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Metasurfaces consisting of nanoscale structures are underpinning new physical principles for the creation and shaping of quantum states of light. Multiphoton states that are entangled in spatial or angular domains are an essential resource for many quantum applications; however, their production traditionally relies on bulky nonlinear crystals. We predict and demonstrate experimentally the generation of spatially entangled photon pairs through spontaneous parametric down-conversion from a metasurface incorporating a nonlinear thin film of lithium niobate covered by a silica meta-grating. We measure the correlations of photon pairs and identify their spatial antibunching through violation of the classical Cauchy-Schwarz inequality, witnessing the presence of multimode entanglement. Simultaneously, the photon-pair rate is strongly enhanced by 450 times as compared to unpatterned films because of high-quality-factor resonances. These results pave the way to miniaturization of various quantum devices by incorporating ultrathin metasurfaces functioning as room temperature sources of quantum-entangled photons.

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Efficient single-photon pair generation by spontaneous parametric down-conversion in nonlinear plasmonic metasurfaces

Abstract: The presented work demonstrates a new efficient ultrathin entangled single-photon pair nanophotonic source based on spontaneous parametric down-conversion working at room temperature.

Cited by 32 publications

References 82 publications

Lithium Niobate Meta-Optics

Lithium Niobate Meta-Optics

Emerging Trend in Unconventional Metasurfaces: From Nonlinear, Non-Hermitian to Nonclassical Metasurfaces

Spatially entangled photon pairs from lithium niobate nonlocal metasurfaces

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