Phase-Matching Controlled Orbital Angular Momentum Conversion in Periodically Poled Crystals

Chen, Yan; Ni, Rui; Wu, Yaodong; Du, Lin; Hu, Xiaopeng; Wei, Dunzhao; Zhu, Shining

doi:10.1103/physrevlett.125.143901

Cited by 41 publications

(15 citation statements)

References 32 publications

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“…The periodic polling can not only enable frequency control 131,132 but when multiplexed it achieves phase-matching for multiple wavelengths in the same crystal 133 . Recently, a novel pattern in the periodic polling named quasi-periodic polling achieved simultaneous second and third harmonic generation 134 . Further, the structuring of the media is not restricted to one dimension: by using oblique incidence on a periodically polled crystal it was possible to couple mode selection with phase matching 135 , coupling DoFs of light and matter.…”

Section: Crystalsmentioning

confidence: 99%

Nonlinear optics with structured light

Buono¹,

Forbes²

2022

OEA

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The interest in tailoring light in all its degrees of freedom is steadily gaining traction, driven by the tremendous developments in the toolkit for the creation, control and detection of what is now called structured light. Because the complexity of these optical fields is generally understood in terms of interference, the tools have historically been linear optical elements that create the desired superpositions. For this reason, despite the long and impressive history of nonlinear optics, only recently has the spatial structure of light in nonlinear processes come to the fore. In this review we provide a concise theoretical framework for understanding nonlinear optics in the context of structured light, offering an overview and perspective on the progress made, and the challenges that remain.

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Section: Crystalsmentioning

confidence: 99%

Nonlinear optics with structured light

Buono¹,

Forbes²

2022

OEA

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“…The azimuthal index l, corresponding to the orbital angular momentum (OAM) of the optical field, 31,32 has been widely employed in an ocean of physical processes. [33][34][35][36][37][38][39][40][41][42][43][44] Meanwhile, OAM finds applications in both DV [45][46][47][48][49][50][51] and CV [52][53][54][55] quantum systems due to the fact that it can form a high-dimensional Hilbert state space. In sharp contrast to the in-depth study of OAM, the radial index of the radial mode is often overlooked 56 and has only attracted attention in the past few years.…”

Section: Introductionmentioning

confidence: 99%

Deterministic generation of large-scale hyperentanglement in three degrees of freedom

Wang

Liu

et al. 2022

Adv. Photon. Nexus

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Entanglement serves as a fundamental resource for quantum information protocols, and hyperentanglement has received an increasing amount of attention for its high-capacity characteristic. Increasing the scale of hyperentanglement, i.e., the number of modes in a hyperentangled system, is crucial for enhancing its capability in quantum information processing. Here, we demonstrate the generation of large-scale continuous-variable (CV) hyperentanglement in three degrees of freedom (DOFs), including azimuthal and radial indices of Laguerre-Gaussian (LG) modes and frequency. In our experiment, 216 pairs of hyperentangled modes are deterministically generated from the four-wave mixing process in an atomic vapor. In addition, we show that the entanglement between coherent LG superposition modes denoted by both azimuthal and radial quantum numbers can also be generated from this system. Such large-scale CV hyperentanglement in three DOFs presents an efficient scheme to significantly increase the information capacity of the CV system. Our results provide a new platform for studying CV quantum information and open the avenue for constructing high-capacity parallel and multiple-DOF CV quantum information protocols.

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“…Consequently, it is more effective to detect the MIR light after converting it into visible/NIR light, utilizing high-performance detectors based on wide bandgap materials like silicon [28]. Due to the high effective nonlinear coefficient and elimination of the walk-off effect, the QPM technique has been used extensively for frequency conversion of light carrying OAM in previous works [29][30][31]. Up to now, the effective up-conversion of mid-infrared light has been realized by using a waveguide [32,33].…”

Section: Introductionmentioning

confidence: 99%

Up-conversion detection of mid-infrared light carrying orbital angular momentum

Ge¹,

Chen²,

Li³

et al. 2022

Chinese Phys. B

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Frequency up-conversion is an effective method of mid-infrared (MIR) detection by converting the long-wavelength photons to the visible domain, where efficient detectors are readily available. Here, we generate the MIR light carrying orbital angular momentum (OAM) from a difference frequency generation process and perform the up-conversion of it via sum frequency conversion in a bulk quasi-phase-matching crystal. The maximum quantum conversion efficiencies from MIR to visible are 34.0%, 10.4%, and 3.5% for light with topological charges of 0, 1, and 2, respectively, which is achieved by utilizing an optimized strong pump light. We also verify the OAM conservation with a specially designed interferometer, and the results agree well with the numerical simulations. Our study opens up the possibilities for generating, manipulating, and detecting MIR light that carries OAM, and will have great potential for optical communications and remote sensing in the MIR regime.

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Phase-Matching Controlled Orbital Angular Momentum Conversion in Periodically Poled Crystals

Cited by 41 publications

References 32 publications

Nonlinear optics with structured light

Nonlinear optics with structured light

Deterministic generation of large-scale hyperentanglement in three degrees of freedom

Up-conversion detection of mid-infrared light carrying orbital angular momentum

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