Resonance fluorescence of a single semiconductor quantum dot: the impact of a fluctuating electrostatic environment

Reigue, Antoine; Hostein, Richard; Voliotis, Valia

doi:10.1088/1361-6641/ab4362

Cited by 14 publications

(8 citation statements)

References 111 publications

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“…It is thus important to stabilize the QD environment, e. g. via electrical gates. In combination with coherent pumping schemes, such as two-photon resonant excitation, we expect a further improvement of the photon coherence time and hence indistinguishability 35 .…”

Section: Discussionmentioning

confidence: 99%

Deterministically fabricated quantum dot single-photon source emitting indistinguishable photons 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 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 QD-micromesa 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 µeV using a closed-loop optical feedback.

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Section: Discussionmentioning

confidence: 99%

Deterministically fabricated quantum dot single-photon source emitting indistinguishable photons in the telecom O-band

Srocka

Mrowiński

Große

et al. 2020

Applied Physics Letters

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show abstract

“…[23] Note, however, that in the latter case the signal was filtered to 5 GHz (see Supporting Information for further measurements and discussions). Instabilities of the magnetic [42,43] or electric field [42,44] at the site of the QD are assumed to be responsible for the decoherence of the emission. Ref.…”

Section: Two-photon Interference Visibilitymentioning

confidence: 99%

Bright Source of Purcell‐Enhanced, Triggered, Single Photons in the Telecom C‐Band

Nawrath,

Joos,

Kolatschek

et al. 2023

Adv Quantum Tech

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Several emission features mark semiconductor quantum dots as promising non‐classical light sources for prospective quantum implementations. For long‐distance transmission and Si‐based on‐chip processing, the possibility to match the telecom C‐band is decisive, while source brightness and high single‐photon purity are key features in virtually any quantum implementation. An InAs/InGaAs/GaAs quantum dot emitting in the telecom C‐band coupled to a circular Bragg grating is presented here. This cavity structure stands out due to its high broadband collection efficiency and high attainable Purcell factors. Here, simultaneously high brightness with a fiber‐coupled single‐photon count rate of 13.9 MHz for an excitation repetition rate of 228 MHz (first‐lens single‐photon collection efficiency ≈17% for NA = 0.6), while maintaining a low multi‐photon contribution of is demonstrated. Moreover, the compatibility with temperatures of up to 40 K attainable with compact cryo coolers, further underlines the suitability for out‐of‐the‐lab implementations.

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“…Their power dependence under laser excitation above barrier is well reproduced by a simple Poissonian model that precisely accounts for the main features and allows to estimate the excitonic capture volume [64]. Inhomogeneous line broadening at low temperature is ascribed to spectral diffusion [11,17,[65][66][67][68]induced by the presence of charged defects nearby the QDs [69] and is specific of the excitonic complex in study [70,71]. Finally, at larger temperature, the photoluminescence of individual QDs broadens and quenches owing to phonon interactions [72][73][74].…”

Section: Introductionmentioning

confidence: 90%

Exciton Dynamics in Droplet Epitaxial Quantum Dots Grown on (311)A Oriented Substrates

Abbarchi¹,

Mano²,

Kuroda³

et al. 2020

Preprint

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Droplet epitaxy allows the efficient fabrication of a plethora of 3D, III-V-based nanostructures on different crystalline orientations. Quantum dots grown on (311)A-oriented surface are obtained with record surface density, with or without a wetting layer. These are appealing features for quantum-dot lasing, thanks to the large density of quantum emitters and a truly 3D lateral confinement. However, the intimate photophysics of this class of nanostructures has not yet been investigated. Here we address the main optical and electronic properties of s-shell excitons in individual quantum dots grown on (311)A substrates with photoluminescence spectroscopy experiments. We show the presence of neutral exciton and biexciton as well as positive and negative charged excitons. We investigate the origins of spectral broadening, identifying them in spectral diffusion at low temperature and phonon-interaction at higher temperature, the presence of fine interactions between electron and hole spin, and a relevant heavy-hole/light-hole mixing. We interpret the level filling with a simple Poissonian model reproducing the power excitation dependence of the s-shell excitons. These results are relevant for the further improvement of this class of quantum emitters and their exploitation as single photon sources for low density samples as well as for efficient lasers for high density samples.

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Resonance fluorescence of a single semiconductor quantum dot: the impact of a fluctuating electrostatic environment

Cited by 14 publications

References 111 publications

Deterministically fabricated quantum dot single-photon source emitting indistinguishable photons in the telecom O-band

Deterministically fabricated quantum dot single-photon source emitting indistinguishable photons in the telecom O-band

Bright Source of Purcell‐Enhanced, Triggered, Single Photons in the Telecom C‐Band

Exciton Dynamics in Droplet Epitaxial Quantum Dots Grown on (311)A Oriented Substrates

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