Strong antibunching from electrically driven devices with long pulses: A regime for quantum-dot single-photon generation

Kessler, Christian; Reischle, M.; Hargart, F.; Schulz, Wolfgang-Michael; Eichfelder, M.; Roßbach, R.; Jetter, Michael; Michler, Peter; Gärtner, P.; Florian, Matthias; Gies, Christopher; Jahnke, F.

doi:10.1103/physrevb.86.115326

Cited by 11 publications

(9 citation statements)

References 24 publications

(26 reference statements)

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“…The effect of the excitation pulse width on the photon antibunching in the conditions of weak and strong power pumping has been studied. [ 96 ] InP/AlGaInP QDs within a planar cavity [ 97 ] were investigated at 20 K. The QDs were excited using electrical pulses of a width as low as 100 ps at repetition rates up to 3.35 GHz. For excitation powers well below saturation and with a short pulse width, the centre peak of the REVIEW g (2) (0) was suppressed, showing high purity SPS.…”

Section: Electrical Control and Tuneability Of Devicesmentioning

confidence: 99%

Electrically Driven Quantum Light Sources

Boretti

Rosa

Mackie

et al. 2015

Advanced Optical Materials

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Typical applications of quantum light require optical sources which generate either individual photons or entangled (correlated) photons. For the sake of practicality and scalability, these quantum sources should be easily produced, operate at room temperature, and be electrically excited and controlled. Here, recent research on quantum sources obtained from electrically driven (ED) devices constructed from p-n junctions integrated in planar optical cavities, micropillars, nanowires, photonic crystals, and active plasmonic elements is reviewed. Single-photon and entangled-photon sources are distinguished by their different roles in the development of either quantum cryptography or quantum computing protocols, and the different types of devices used to produce them are highlighted, with a focus on their spectral emission, brightness, and conditions of operation. Achievements to date are summarized and compared with prerequisites for the practical use of these sources. Important recent results that could provide future novel quantum sources are also in focus, where more practical requirements could be addressed by the judicious engineering of materials and careful device design

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Section: Electrical Control and Tuneability Of Devicesmentioning

confidence: 99%

Electrically Driven Quantum Light Sources

Boretti

Rosa

Mackie

et al. 2015

Advanced Optical Materials

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“…At the same time a miniaturization down to the very core of cavity-QED can be achieved, where a single emitter interacts with a single mode of the confined electromagnetic field [4,5]. Besides being a profound testing ground for quantum optics, this regime offers application potential in the quantum-information technologies, where single photons are required on demand and at high repetition rates from integrated devices [4,6].…”

Section: Introductionmentioning

confidence: 99%

Phonon-mediated off-resonant coupling effects in semiconductor quantum-dot lasers

et al. 2013

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The impact of non-resonant background emitters in semiconductor quantum-dot microcavity lasers is addressed within theoretical investigations based on the solution of the von Neumann equation. Off-resonant coupling between emitter resonances and the cavity mode is enabled via phonons, which are included in the von Neumann dynamics by an effective Lindblad contribution. The results show enhanced coherent emission from non-resonantly coupled quantum dots, while the frequently used phenomenological cavity feeding mechanism only enhances the thermal component of the emission.

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“…Alternatively, a single emitter can be driven with a pump pulse to emit exactly one photon on demand per excitation cycle like a turnstile device [5]. Semiconductor quantum dots (QDs) possess distinct properties that make them suited for applications as single-photon sources, such as the possibility of electrical pumping [6]. Resonant excitation schemes have been used to get closer to the ideal case of an isolated "atomlike" single-photon emitter [7].…”

mentioning

confidence: 99%

Photon antibunching from few quantum dots in a cavity

2015

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Single quantum dots (QDs) are frequently used as single-photon sources, taking advantage of the final exciton decay in a cascade that produces energetically detuned photons. We propose and analyze a new concept of single-photon source, namely, a few-QD microcavity system driven close to, but below the lasing threshold under strong excitation. Surprisingly, even for two or three QDs inside a cavity, antibunching is observed. To quantify the results, we find that a classification of single-photon emission in terms of antibunching in the autocorrelation function g (2) (0) is insufficient and more details of the photon statistics are required. Our investigations are based on a quantum-optical theory that we solve to obtain the density operator for the quantum-mechanical active medium and radiation field.Introduction. Single-photon sources are key components in quantum-information technologies. They enable the realization of fundamental quantum-mechanical concepts in current applications [1], such as quantum key distribution, quantum teleportation, and Bell measurements. To generate single photons, in many practical applications sources based on parametric down conversion are used [2][3][4]. Alternatively, a single emitter can be driven with a pump pulse to emit exactly one photon on demand per excitation cycle like a turnstile device [5]. Semiconductor quantum dots (QDs) possess distinct properties that make them suited for applications as single-photon sources, such as the possibility of electrical pumping [6]. Resonant excitation schemes have been used to get closer to the ideal case of an isolated "atomlike" single-photon emitter [7]. When using a single QD, a preceding photon from the biexciton recombination can be used to herald the single photon from the exciton recombination, which is always second in the cascade. The extremely high single-photon purity (close to the ideal single-photon Fock state) obtained from these sources comes at the cost of low repetition rates that are limited by the free-space radiative lifetime of hundreds of picoseconds [1,8].QD microcavity laser devices have been demonstrated to exhibit nonclassical features in the light emission around threshold [9,10]. In the following, we explore this quantum regime for single-photon operation from a single-to fewemitter QD medium. The presence of a cavity enhances the emission rate via the Purcell effect [11], and operation in the gigahertz regime has been demonstrated for a single QD in a micropillar resonator [12]. The prospect of achieving single-photon emission with several QD emitters coupling to the cavity reduces the requirement on device fabrication to rely on samples with only a single QD.For single-QD microcavity devices, we identify an optimal balance between cavity-loss rate and light-matter coupling strength that maximizes the emission rate and the degree of antibunching seen in g (2) (0). Next, we explore devices with up to three QDs and quantify their performance in terms of achievable repetition rates, purity of single-photon emi...

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Strong antibunching from electrically driven devices with long pulses: A regime for quantum-dot single-photon generation

Cited by 11 publications

References 24 publications

Electrically Driven Quantum Light Sources

Electrically Driven Quantum Light Sources

Phonon-mediated off-resonant coupling effects in semiconductor quantum-dot lasers

Photon antibunching from few quantum dots in a cavity

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