Time-resolved and antibunching experiments on single quantum dots at 1300nm

Zinoni, C.; Alloing, Blandine; Monat, Christelle; Zwiller, Valéry; Li, Lianhe; Fiore, Andrea; Lunghi, L.; Gerardino, A.; Riedmatten, Hugues de; Zbinden, Hugo; Gisin, Nicolas

doi:10.1063/1.2190466

Cited by 108 publications

(111 citation statements)

References 30 publications

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“…A first example is single quantum dots embedded in microcavities. Quantum dots offer more flexibility for the wavelength of the emitted photon, in particular, single photons sources at telecommunication wavelength based on quantum dots have been demonstrated (Hostein et al, 2009;Ward et al, 2005;Zinoni et al, 2006). The demonstrated photon bandwidths are however still far to large to match the memory bandwidths.…”

Section: Single Photon Sources Based On Single Quantum Emittersmentioning

confidence: 99%

Quantum repeaters based on atomic ensembles and linear optics

et al. 2011

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The distribution of quantum states over long distances is limited by photon loss. Straightforward amplification as in classical telecommunications is not an option in quantum communication because of the no-cloning theorem. This problem could be overcome by implementing quantum repeater protocols, which create long-distance entanglement from shorter-distance entanglement via entanglement swapping. Such protocols require the capacity to create entanglement in a heralded fashion, to store it in quantum memories, and to swap it. One attractive general strategy for realizing quantum repeaters is based on the use of atomic ensembles as quantum memories, in combination with linear optical techniques and photon counting to perform all required operations. Here we review the theoretical and experimental status quo of this very active field. We compare the potential of different approaches quantitatively, with a focus on the most immediate goal of outperforming the direct transmission of photons.

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Section: Single Photon Sources Based On Single Quantum Emittersmentioning

confidence: 99%

Quantum repeaters based on atomic ensembles and linear optics

et al. 2011

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“…In addition, the APDs are usually operated under gated mode to increase the signal to noise ratio, a procedure that requires a precise synchronization of the excitation sources, detectors and electronic correlators. In reference [11], for instance, it was demonstrated single photon emission at 1.3 µm of band-pass filtered InAs QD luminescence in a cavity using InGaAs APDs detectors. Here, the whole setup was synchronized by a delay generator triggered through the excitation laser, the APD gate and the Time Correlated Single Photon Counting (TCSPC) board.…”

Section: Introductionmentioning

confidence: 99%

Time resolved emission at 1.3 μm of a single InAs quantum dot by using a tunable fibre Bragg grating

et al. 2013

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Photoluminescence and time resolved photoluminescence from single metamorphic InAs/GaAs quantum dots (QDs) emitting at 1.3 μm have been measured by means of a novel fibre-based characterization set-up. We demonstrate that the use of a wavelength tunable Fibre Bragg Grating (FBG) filter increases the light collection efficiency by more than one order of magnitude as compared to a conventional grating monochromator. We identified single charged exciton and neutral biexciton transitions on the framework of a random population model. The QD recombination dynamics under pulsed excitation can be understood under the weak quantum confinement potential limit and the interaction between carriers at the Wetting Layer (WL) and QD states. 68.65.La, 78.47.jd, 42.79.Ci, Introduction: PACS:

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“…Semiconductor quantum dots are a promising platform for single [13][14][15][16][17][18] and entangled photon emitters 19,20 , owing to fundamentally sub-Poissonian emission statistics and common features with standard optoelectronics such as electrical control and pumping. So far, most progress has been made at shorter wavelengths around 900 nm, unsuitable for transmission over long distances in fibre.…”

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confidence: 99%

Coherent dynamics of a telecom-wavelength entangled photon source

et al. 2014

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Quantum networks can interconnect remote quantum information processors, allowing interaction between different architectures and increasing net computational power. Fibreoptic telecommunications technology offers a practical platform for routing weakly interacting photonic qubits, allowing quantum correlations and entanglement to be established between distant nodes. Although entangled photons have been produced at telecommunications wavelengths using spontaneous parametric downconversion in nonlinear media, as system complexity increases their inherent excess photon generation will become limiting. Here we demonstrate entangled photon pair generation from a semiconductor quantum dot at a telecommunications wavelength. Emitted photons are intrinsically antibunched and violate Bell's inequality by 17 standard deviations High-visibility oscillations of the biphoton polarization reveal the time evolution of the emitted state with exceptional clarity, exposing long coherence times. Furthermore, we introduce a method to evaluate the fidelity to a time-evolving Bell state, revealing entanglement between photons emitted up to 5 ns apart, exceeding the exciton lifetime.

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Time-resolved and antibunching experiments on single quantum dots at 1300nm

Abstract: Zinoni, C.; Alloing, B.; Monat, C.; Zwiller, V.; Li, L.; Fiore, A.; Lunghi, L.; Gerardino, A.; Riedmatten, de, H.; Zbinden, H.; Gisin, N.

Cited by 108 publications

References 30 publications

Quantum repeaters based on atomic ensembles and linear optics

Quantum repeaters based on atomic ensembles and linear optics

Time resolved emission at 1.3 μm of a single InAs quantum dot by using a tunable fibre Bragg grating

Coherent dynamics of a telecom-wavelength entangled photon source

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