Resolved Sideband Emission of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>InAs</mml:mi><mml:mo>/</mml:mo><mml:mi>GaAs</mml:mi></mml:math>Quantum Dots Strained by Surface Acoustic Waves

Metcalfe, Michael; Carr, Stephen M; Müller, Andreas; Solomon, Glenn S.; Lawall, John

doi:10.1103/physrevlett.105.037401

Cited by 152 publications

(153 citation statements)

References 18 publications

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“…Recent reports on QD spectroscopy have shown a strong instability of the QD charge state under strictly resonant excitation [28][29][30] , which could be overcome using a second nonresonant excitation with very low power. In the present measurement, the very high brightness of the source is observed either using wetting layer or p shell excitation, showing a very stable QD charge state.…”

Section: Discussionmentioning

confidence: 99%

Bright solid-state sources of indistinguishable single photons

et al. 2013

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Bright sources of indistinguishable single photons are strongly needed for the scalability of quantum information processing. Semiconductor quantum dots are promising systems to build such sources. Several works demonstrated emission of indistinguishable photons while others proposed various approaches to efficiently collect them. Here we combine both properties and report on the fabrication of ultrabright sources of indistinguishable single photons, thanks to deterministic positioning of single quantum dots in well-designed pillar cavities. Brightness as high as 0.79±0.08 collected photon per pulse is demonstrated. The indistinguishability of the photons is investigated as a function of the source brightness and the excitation conditions. We show that a two-laser excitation scheme allows reducing the fluctuations of the quantum dot electrostatic environment under high pumping conditions. With this method, we obtain 82 ± 10% indistinguishability for a brightness as large as 0.65 ± 0.06 collected photon per pulse.

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Section: Discussionmentioning

confidence: 99%

Bright solid-state sources of indistinguishable single photons

et al. 2013

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“…In this device there is no optical cavity, but it is possible to couple the mechanical mode through strain [38,39] to the optical transition of a quantum dot that can be placed in the GaAs region. This would allow the mechanical mode to be cooled down to the ground state [40,41] and has interesting applications such as quantum state transfer between the mechanical resonator and the two level system [42].…”

Section: Resultsmentioning

confidence: 99%

Acoustic confinement in superlattice cavities

García-Sánchez

Deléglise²,

Thomas

et al. 2016

Phys. Rev. A

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The large coupling rate between the acoustic and optical fields confined in GaAs/AlAs superlattice cavities makes them appealing systems for cavity optomechanics. We have developed a mathematical model based on the scattering matrix that allows the acoustic guided modes to be predicted in nano and micropillar superlattice cavities. We demonstrate here that the reflection at the surface boundary considerably modifies the acoustic quality factor and leads to significant confinement at the micropillar center. Our mathematical model also predicts unprecedented acoustic Fano resonances on nanopillars featuring small mode volumes and very high mechanical quality factors, making them attractive systems for optomechanical applications.

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“…(1), (4) and (8), this shift has to be taken into account by adjusting the light frequency ω L to the polaron-shifted transition frequency. The shift of the exciton line caused by the exciton-phonon interaction can be directly seen in experiments measuring either the passage of a strain pulse through the dot [144,145] or by applying a periodic strain modulation in terms of a surface acoustic wave, where it leads to sidebands in the QD fluorescence spectrum [146]. It can be even exploited for an ultrafast switching of a QD placed in a microcavity into the lasing regime by shifting the transition frequency into resonance with the cavity mode [83].…”

Section: Rabi Oscillationsmentioning

confidence: 99%

The role of phonons for exciton and biexciton generation in an optically driven quantum dot

Reiter

Kuhn

Glässl

et al. 2014

J. Phys.: Condens. Matter

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Abstract. For many applications of semiconductor quantum dots in quantum technology a well controlled state preparation of the quantum dot states is mandatory. Since quantum dots are embedded in the semiconductor matrix, the interaction with phonons plays often a major role in the preparation process. In this review, we discuss the influence of phonons on three basically different optical excitation schemes which can be used for the preparation of exciton, biexciton, and superposition states: a resonant excitation leading to Rabi rotations in the excitonic system, an excitation with chirped pulses exploiting the effect of adiabatic rapid passage, and an off-resonant excitation giving rise to a phononassisted state preparation. We give an overview over experimental and theoretical results showing the role of the phonons and compare the performance of the schemes for state preparation.

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Resolved Sideband Emission ofInAs/GaAsQuantum Dots Strained by Surface Acoustic Waves

Cited by 152 publications

References 18 publications

Bright solid-state sources of indistinguishable single photons

Bright solid-state sources of indistinguishable single photons

Acoustic confinement in superlattice cavities

The role of phonons for exciton and biexciton generation in an optically driven quantum dot

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