On-chip single photon emission from a waveguide-coupled two-dimensional semiconductor

Errando-Herranz, Carlos; Schöll, Eva; Picard, Raphaël; Laini, Micaela; Gyger, Samuel; Elshaari, Ali W.; Branny, Artur; Wennberg, Ulrika; Gisbert, Mauro Brotóns i; Bonato, Cristian; Gerardot, Brian D.; Zwiller, Valéry; Jöns, Klaus D.

doi:10.1117/12.2567240

Cited by 5 publications

(20 citation statements)

References 42 publications

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“…The cavity provides strong coupling if the slot width is sufficiently small, and it also provides advantages in extraction efficiency (β) since (i) cavity and output waveguide share the same cross section, so the modes are perfectly matched; (ii) the integration of the QE (for example colloidal QDs) can be done by direct deposition on top of the cavity, which avoids interferences by total internal reflection and enhances β; and (iii) the slot mode has the field maxima at the edges of the slot, which matches well with the region of maximum probability of having SPS in 2D materials deposited on top of waveguides. 39 Finally, the cavity modal volumes are in the order of 10 −3 (λ/2n) 3 along with the whole slot, increasing the probability of having one or several QE strongly coupled to the cavity mode. As a proof of concept, we have fabricated a specific design valid for diamond color center requirements.…”

Section: ■ Methodsmentioning

confidence: 99%

Numerical Optimization of a Nanophotonic Cavity by Machine Learning for Near-Unity Photon Indistinguishability at Room Temperature

et al. 2022

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Room-temperature (RT), on-chip deterministic generation of indistinguishable photons coupled to photonic integrated circuits is key for quantum photonic applications. Nevertheless, high indistinguishability (I) at RT is difficult to obtain due to the intrinsic dephasing of most deterministic singlephoton sources (SPS). Here, we present a numerical demonstration of the design and optimization of a hybrid slot-Bragg nanophotonic cavity that achieves a theoretical near-unity I and a high coupling efficiency (β) at RT for a variety of single-photon emitters. Our numerical simulations predict modal volumes in the order of 10 −3 (λ/2n) 3 , allowing for strong coupling of quantum photonic emitters that can be heterogeneously integrated. We show that high I and β should be possible by fine-tuning the quality factor (Q) depending on the intrinsic properties of the single-photon emitter. Furthermore, we perform a machine learning optimization based on the combination of a deep neural network and a genetic algorithm (GA) to further decrease the modal volume by almost 3 times while relaxing the tight dimensions of the slot width required for strong coupling. The optimized device has a slot width of 20 nm. The design requires fabrication resolution in the limit of the current state-of-the-art technology. Also, the condition for high I and β requires a positioning accuracy of the quantum emitter at the nanometer level. Although the proposal is not a scalable technology, it can be suitable for experimental demonstration of single-photon operation.

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Section: ■ Methodsmentioning

confidence: 99%

Numerical Optimization of a Nanophotonic Cavity by Machine Learning for Near-Unity Photon Indistinguishability at Room Temperature

et al. 2022

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“…Reproduced with permission from 149 , Copyright 2016 The Optical Society of America. Reproduced with permission from 230 , licensed under a Creative Commons Attribution (CC-BY) license. ear optics and quantum photonics is being gradually discovered and investigated (e.g., optical parametric generation 242 and gate tunable nonlinearity 243 ).…”

Section: A New Materials Platformsmentioning

confidence: 99%

“…Their hybrid integration in conventional photonic waveguide platform is also under active research (as illustrated in Fig. 6(c)) 230 . With graphene and graphene oxide 244 deposited on top of silicon 245,246 and silicon nitride 247 waveguides and optical fibers 248,249 , the effective Kerr nonlinearity of the composite waveguide structure were shown be strongly enhanced.…”

Section: A New Materials Platformsmentioning

confidence: 99%

Integrated photon-pair sources with nonlinear optics

Wang¹,

Jöns

Sun

2021

Applied Physics Reviews

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Assisted by the rapid development of photonic integrated circuits, scalable and versatile chip-based quantum light sources with nonlinear optics are increasingly tangible for real-world applications. In this review, we introduce the basic concepts behind parametric photon pair sources and discuss the current state-of-the-art photon pair generation in detail bur also highlight future perspectives in hybrid integration, novel waveguide structures and on-chip multiplexing. The advances in near-deterministic integrated photon pair sources are deemed to pave the way for the realization of large-scale quantum photonic integrated circuits for applications including quantum telecommunication, quantum sensing, quantum metrology and photonic quantum computing.

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“…Visions of fully integrated quantum photonic chips, which require on-demand indistinguishable single photon generation integrated on-chip with lowloss directional couplers, phase shifters, filters, and single photon detectors, have been presented [1][2][3][4]. On-chip integration of solid-state emitters such as color centers in diamond [5][6][7][8], molecules [9,10], 2D materials [11][12][13][14], and III-V semiconductor quantum dots (QDs) [15][16][17][18][19][20][21], are particularly promising for these applications. As solid-state emitters reach maturity, the next logical step is to interface these sources with larger quantum photonic architectures to promote scalability and realization of multipartite quantum information protocols [22].…”

Section: Introductionmentioning

confidence: 99%

Multiplexed Single Photons from Deterministically Positioned Nanowire Quantum Dots

Koong,

Ballesteros-Garcia,

Proux

et al. 2020

Preprint

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Solid-state quantum emitters are excellent sources of on-demand indistinguishable or entangled photons and can host long-lived spin memories, crucial resources for photonic quantum information applications. However, their scalability remains an outstanding challenge. Here we present a scalable technique to multiplex streams of photons from multiple independent quantum dots, on-chip, into a fiber network for use "off-chip. Multiplexing is achieved by incorporating a multi-core fiber into a confocal microscope and spatially matching the multiple foci, seven in this case, to quantum dots in an array of deterministically positioned nanowires. First, we report the coherent control of the emission of biexciton-exciton cascade from a single nanowire quantum dot under resonant twophoton excitation. Then, as a proof-of-principle demonstration, we perform parallel spectroscopy on the nanowire array to identify two nearly identical quantum dots at different positions which are subsequently tuned into resonance with an external magnetic field. Multiplexing of background-free single photons from these two quantum dots is then achieved. Our approach, applicable to all types of quantum emitters, can readily be scaled up to multiplex > 100 quantum light sources, providing a breakthrough in hardware for photonic based quantum technologies. Immediate applications include quantum communication, quantum simulation, and quantum computation.

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On-chip single photon emission from a waveguide-coupled two-dimensional semiconductor

Cited by 5 publications

References 42 publications

Numerical Optimization of a Nanophotonic Cavity by Machine Learning for Near-Unity Photon Indistinguishability at Room Temperature

Numerical Optimization of a Nanophotonic Cavity by Machine Learning for Near-Unity Photon Indistinguishability at Room Temperature

Integrated photon-pair sources with nonlinear optics

Multiplexed Single Photons from Deterministically Positioned Nanowire Quantum Dots

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