A tuneable telecom wavelength entangled light emitting diode deployed in an installed fibre network

Xiang, Zi-Heng; Huwer, Jan; Skiba-Szymanska, J.; Stevenson, R. M.; Ellis, David; Farrer, I.; Ward, M. B.; Ritchie, D. A.; Shields, A. J.

doi:10.1038/s42005-020-0390-7

Cited by 28 publications

(22 citation statements)

References 57 publications

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“…The limiting factors are the structural quality of the QD material and the spatial QD density. Additionally, the possibility of tuning the QD‐based SPSs with external strain and static electric field [ 41,42 ] as well as electrical excitation [ 43 ] could be easily integrated in our source, rendering its application potential even larger. Therefore, these results pave the way to real‐word application of QD‐based fiber quantum networks.…”

Section: Resultsmentioning

confidence: 99%

Plug&Play Fiber‐Coupled 73 kHz Single‐Photon Source Operating in the Telecom O‐Band

et al. 2020

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A user‐friendly, fiber‐coupled, single‐photon source operating at telecom wavelengths is a key component of photonic quantum networks providing long‐haul, ultra‐secure data exchange. To take full advantage of quantum‐mechanical data protection and to maximize the transmission rate and distance, a true quantum source providing single photons on demand is highly desirable. This great challenge is tackled by developing a ready‐to‐use semiconductor quantum‐dot‐based device that launches single photons at a wavelength of 1.3 µm directly into a single‐mode optical fiber. In the proposed approach, the quantum dot is deterministically integrated into a nanophotonic structure to ensure efficient on‐chip coupling into a fiber. The whole arrangement is integrated into a 19ʺ compatible housing to enable stand‐alone operation by cooling via a compact Stirling cryocooler. The realized source delivers single photons with a multiphoton events probability as low as 0.15 and a single‐photon emission rate of up to 73 kHz into a standard telecom single‐mode fiber.

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Section: Resultsmentioning

confidence: 99%

Plug&Play Fiber‐Coupled 73 kHz Single‐Photon Source Operating in the Telecom O‐Band

et al. 2020

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“…In all cases, SPSs with narrow linewidths and high multi-photon suppression could be demonstrated. It was also possible to develop electrically driven entangled photon pair sources based on 1.55 µm QDs and to use them for fiber-based QC [139].…”

Section: Statusmentioning

confidence: 99%

2022 Roadmap on integrated quantum photonics

et al. 2022

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Integrated photonics will play a key role in quantum systems as they grow from few-qubit prototypes to tens of thousands of qubits. The underlying optical quantum technologies can only be realized through the integration of these components onto quantum photonic integrated circuits (QPICs) with accompanying electronics. In the last decade, remarkable advances in quantum photonic integration have enabled table-top experiments to be scaled down to prototype chips with improvements in efficiency, robustness, and key performance metrics. These advances have enabled integrated quantum photonic technologies combining up to 650 optical and electrical components onto a single chip that are capable of programmable quantum information processing, chip-to-chip networking, hybrid quantum system integration, and high-speed communications. In this roadmap article, we highlight the status, current and future challenges, and emerging technologies in several key research areas in integrated quantum photonics, including photonic platforms, quantum and classical light sources, quantum frequency conversion, integrated detectors, and applications in computing, communications, and sensing. With advances in materials, photonic design architectures, fabrication and integration processes, packaging, and testing and benchmarking, in the next decade we can expect a transition from single- and few-function prototypes to large-scale integration of multi-functional and reconfigurable devices that will have a transformative impact on quantum information science and engineering.

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“…Even more, it is important to operate such light sources at telecommunication wavelengths, i.e., within the telecom Oband ($1.3 lm) or C-band ($1.55 lm) with enhanced brightness 5 and a deterministic fabrication scheme, 6 to pave the way toward the real-world implementation of long-distance quantum communication networks via optical fibers, as recently reported using electrical Stark tuning of a quantum dot (QD) device. 7 In this work, we demonstrate technological advances and experimental findings to realize wavelength-tunable quantum emitters of high single-photon purity in the telecom O-band. The strain-tunable emitters are based on self-assembled InGaAs quantum dots that are deterministically integrated into photonic nanostructures attached to piezoelements by means of a flip-chip process.…”

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confidence: 89%

Deterministically fabricated strain-tunable quantum dot single-photon sources emitting in the telecom O-band

Srocka

Mrowiński

Große

et al. 2020

Applied Physics Letters

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Most quantum communication schemes aim at the long-distance transmission of quantum information. In the quantum repeater concept, the transmission line is subdivided into shorter links interconnected by entanglement distribution via Bell-state measurements to overcome inherent channel losses. This concept requires on-demand single-photon sources with a high degree of multi-photon suppression and high indistinguishability within each repeater node. For a successful operation of the repeater, a spectral matching of remote quantum light sources is essential. We present a spectrally tunable single-photon source emitting in the telecom O-band with the potential to function as a building block of a quantum communication network based on optical fibers. A thin membrane of GaAs embedding InGaAs quantum dots (QDs) is attached onto a piezoelectric actuator via gold thermocompression bonding. Here, the thin gold layer acts simultaneously as an electrical contact, strain transmission medium, and broadband backside mirror for the QD-micromesa. The nanofabrication of the QDmicromesa is based on in situ electron-beam lithography, which makes it possible to integrate pre-selected single QDs deterministically into the center of monolithic micromesa structures. The QD pre-selection is based on distinct single-QD properties, signal intensity, and emission energy. In combination with strain-induced fine tuning, this offers a robust method to achieve spectral resonance in the emission of remote QDs. We show that the spectral tuning has no detectable influence on the multi-photon suppression with g (2) (0) as low as 2%-4% and that the emission can be stabilized to an accuracy of 4 leV using a closed-loop optical feedback.

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A tuneable telecom wavelength entangled light emitting diode deployed in an installed fibre network

Cited by 28 publications

References 57 publications

Plug&Play Fiber‐Coupled 73 kHz Single‐Photon Source Operating in the Telecom O‐Band

Plug&Play Fiber‐Coupled 73 kHz Single‐Photon Source Operating in the Telecom O‐Band

2022 Roadmap on integrated quantum photonics

Deterministically fabricated strain-tunable quantum dot single-photon sources emitting in the telecom O-band

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