Photon pairs bi-directionally emitted from a resonant metasurface

Son, Changjin; Sultanov, Vitaliy; Santiago-Cruz, Tomás; Anthur, Aravind P.; Zhang, Haizhong; Paniagua‐Domínguez, Ramón; Krivitskiy, Leonid; Kuznetsov, Arseniy I.; Chekhova, Maria V.

doi:10.1039/d2nr05499j

Cited by 22 publications

(4 citation statements)

References 22 publications

(64 reference statements)

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“…[60] Single or multiple resonances, pumped at various wavelengths, can be used to create multifrequency quantum states such as cluster states. A metasurface carrying qBIC also allows the bi-directional emission of photon pairs, [74] which can be used for demultiplexing of photons at the nanoscale. Additionally, Ma et al introduce a versatile method for engineering polarization states in photon pairs generated from a nonlinear metasurface [61] (Figure 3h).…”

Section: Generation Of Quantum Entangled Photon Pairs From Nonlinear ...mentioning

confidence: 99%

Engineering Quantum Light Sources with Flat Optics

Ma,

Zhang,

Horder

et al. 2024

Advanced Materials

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Quantum light sources are essential building blocks for many quantum technologies, enabling secure communication, powerful computing, precise sensing and imaging. Recent advancements have witnessed a significant shift towards the utilization of “flat” optics with thickness at subwavelength scales for the development of quantum light sources. This approach offers notable advantages over conventional bulky counterparts, including compactness, scalability, and improved efficiency, along with added functionalities. This review focuses on the recent advances in leveraging flat optics to generate quantum light sources. Specifically, we explore the generation of entangled photon pairs through spontaneous parametric down‐conversion in nonlinear metasurfaces, as well as single photon emission from quantum emitters including quantum dots and color centers in 3D and 2D materials. The review covers theoretical principles, fabrication techniques, and properties of these sources, with particular emphasis on the enhanced generation and engineering of quantum light sources using optical resonances supported by nanostructures. We discuss the diverse application range of these sources and highlight the current challenges and perspectives in the field.This article is protected by copyright. All rights reserved

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Section: Generation Of Quantum Entangled Photon Pairs From Nonlinear ...mentioning

confidence: 99%

Engineering Quantum Light Sources with Flat Optics

Ma,

Zhang,

Horder

et al. 2024

Advanced Materials

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“…Recently, there have been several experimental demonstrations of photon-pair generation 12 and manipulation 13,14 in much smaller nonlinear systems, with at least one subwavelength-sized dimension, like thin films, [15][16][17][18] nanowires, 19 dielectric nanoresonators, 20 and metasurfaces. [21][22][23][24] For instance, Ref. 18 demonstrated spectrally broadband generation of tunable polarization-entangled photon pairs from a subwavelength nonlinear film, not restricted by phase-matching conditions.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear nanoresonators for Bell state generation

Weissflog,

Dezert,

Vinel

et al. 2024

Applied Physics Reviews

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Entangled photon states are a fundamental resource for optical quantum technologies and investigating the fundamental predictions of quantum mechanics. Up to now such states are mainly generated in macroscopic nonlinear optical systems with elaborately tailored optical properties. In this theoretical work, we extend the understanding on the generation of entangled photonic states toward the nanoscale regime by investigating the fundamental properties of photon-pair generation in sub-wavelength nonlinear nanoresonators. Taking materials with Zinc-Blende structure as an example, we reveal that such systems can naturally generate various polarization-entangled Bell states over a very broad range of wavelengths and emission directions, with little to no engineering needed. Interestingly, we uncover different regimes of operation, where polarization-entangled photons can be generated with dependence on or complete independence from the pumping wavelength and polarization, and the modal content of the nanoresonator. Our work also shows the potential of nonlinear nanoresonators as miniaturized sources of biphoton states with highly complex and tunable properties.

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“…In linear and nonlinear optics, flat optical devices already outperform their bulk counterparts, especially in terms of tunability and multifunctionality. , “Flat” platforms are also promising sources of quantum light, including single-photon and two-photon states. − Miniaturized two-photon sources mainly use spontaneous parametric down-conversion (SPDC) without momentum conservation, which gives unprecedented flexibility for the engineering of quantum entanglement in position-momentum, , time-frequency, and polarization, although at the cost of low-generation efficiency. Researchers try out different materials and designs for nanoscale sources of quantum light, investigating new approaches for generation rate enhancement, quantum state engineering, and adding multifunctionality. − …”

Section: Introductionmentioning

confidence: 99%

Temporally Distilled High-Dimensional Biphotonic States from Thin Sources

Sultanov,

Chekhova

2023

ACS Photonics

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Generation of entangled photons through spontaneous parametric down-conversion (SPDC) from micro-and nanoscale sources offers unprecedented freedom in quantum state engineering, including the ability to generate two-photon states with high-dimensional hyperentanglement. However, as the source of SPDC gets smaller, the role of photoluminescence increases, which leads to the contamination of two-photon states with a thermal background. Here we propose and implement a solution to this problem: by using pulsed SPDC and time distillation, we increase the purity and the heralding efficiency of the photon pairs. In the experiment, we increased the purity of the two-photon states generated in a 7 μm film of lithium niobate from 0.002 to 0.99. With the higher purity we were able to observe and characterize different polarization states of photon pairs generated simultaneously due to relaxed phase matching. In particular, we showed the presence of orthogonally polarized photons that are potentially usable for the generation of polarization entanglement.

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Photon pairs bi-directionally emitted from a resonant metasurface

Abstract: Metasurfaces are artificially structured surfaces able to control the properties of light at subwavelength scales. While, initially, they have been proposed as means to control classical optical fields, they are...

Cited by 22 publications

References 22 publications

Engineering Quantum Light Sources with Flat Optics

Engineering Quantum Light Sources with Flat Optics

Nonlinear nanoresonators for Bell state generation

Temporally Distilled High-Dimensional Biphotonic States from Thin Sources

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