Phonon-Induced Rabi-Frequency Renormalization of Optically Driven Single<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>InGaAs</mml:mi><mml:mo>/</mml:mo><mml:mi>GaAs</mml:mi></mml:math>Quantum Dots

Ramsay, Andrew J.; Godden, T. M.; Boyle, S. J.; Gauger, Erik M.; Nazir, Ahsan; Lovett, Brendon W.; Fox, A. M.; Skolnick, M. S.

doi:10.1103/physrevlett.105.177402

Cited by 206 publications

(306 citation statements)

References 25 publications

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“…The oscillation of the RF intensity is due to the wellknown Rabi rotation between the ground and the excitonic state. It has been demonstrated previously by quasi-resonant [34][35][36] or resonant driving [21,32]. The RF intensity reaches its first peak at the π pulse.…”

Section: Pulsed Resonance Fluorescencementioning

confidence: 81%

On-demand semiconductor single-photon source with near-unity indistinguishability

et al. 2013

Nature Nanotech

501

351

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Single photon sources based on semiconductor quantum dots offer distinct advantages for quantum information, including a scalable solid-state platform, ultrabrightness, and interconnectivity with matter qubits. A key prerequisite for their use in optical quantum computing and solid-state networks is a high level of efficiency and indistinguishability. Pulsed resonance fluorescence (RF) has been anticipated as the optimum condition for the deterministic generation of high-quality photons with vanishing effects of dephasing. Here, we generate pulsed RF single photons on demand from a single, microcavity-embedded quantum dot under s-shell excitation with 3-ps laser pulses. The π-pulse excited RF photons have less than 0.3% background contributions and a vanishing two-photon emission probability. Non-postselective Hong-Ou-Mandel interference between two successively emitted photons is observed with a visibility of 0.97(2), comparable to trapped atoms and ions. Two single photons are further used to implement a high-fidelity quantum controlled-NOT gate.Single photons have been proposed as promising quantum bits (qubits) for quantum communication [1], linear optical quantum computing [2, 3] and as messengers in quantum networks [4]. These proposals primarily rely upon a high degree of indistinguishability between individual photons to obtain the Hong-Ou-Mandel (HOM) type interference [5] which is at the heart of photonic controlled logic gates and photon-interference-mediated quantum networking [1][2][3][4].Among different types of single-photon emitters [6, 7], quantum dots (QDs) are attractive solid-state devices since they can be embedded in high-quality nanostructure cavities and waveguides to generate ultra-bright sources of single and entangled photons [7][8][9][10]. QDs also provide a light-matter interface [11][12][13] and can in principle be scaled to large quantum networks [14]. Two-photon HOM interference experiments using photons from a single QD [5,15,17], as well as from independent sources [18,19], have not only demonstrated the potential of QDs as single-photon sources, but also revealed the level of dephasing arising from incoherent excitation. The method of incoherent pumping (via above band-gap or p-shell excitation) typically causes reduced photon coherence times due to homogeneous broadening of the excited state [5] and uncontrolled emission time jitter from the nonradiative high-level to s-shell relaxation [6], leading to a decrease of photon indistinguishability.To eliminate these dephasings, an increasing effort has been devoted to s-shell resonant optical excitation of QDs. The Mollow triplet spectra and photon correlations of the resonance fluorescence (RF) have been measured [1][2][3]21]. Under continuous-wave (CW) laser excitation, a high degree of indistinguishability for continuously generated RF photons has been demonstrated through post-selective HOM interference [25]. However, in the CW regime, as the emission time of the RF photons is uncontrolled, the HOM interference relies on th...

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Section: Pulsed Resonance Fluorescencementioning

confidence: 81%

On-demand semiconductor single-photon source with near-unity indistinguishability

et al. 2013

Nature Nanotech

501

351

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“…A very good agreement of the damping behavior of measured Rabi rotations with pulse areas up to 12π and theoretical calculations including the electron-phonon coupling as described in Sec. 2 has been recently demonstrated [53,54] (see also Fig. 6).…”

Section: Rabi Rotationsmentioning

confidence: 99%

“…Occupation of the exciton state as a function of the pulse area at T = 5 K obtained from photocurrent measurements (dots) and calculated using the model discussed in the paper (solid line). We thank A. J. Ramsay for providing us with the experimental data originally published in [54].…”

Section: Rabi Oscillationsmentioning

confidence: 99%

“…Here, most important is the coupling to phonons. For strongly confined dots, on short time scales, the coupling of excitons to acoustic phonons via the pure dephasing mechanism [48,49,50,51] has been identified as typically being the dominant source of decoherence [50,52,53,54]. The corresponding Hamiltonian reads:…”

Section: Quantum Dot Modelmentioning

confidence: 99%

“…Since then, many other experiments have been performed and nowadays Rabi rotations are commonly used in many optical control experiments [157,158,159,160,161,162,54,53,148,163,164].…”

Section: Rabi Rotationsmentioning

confidence: 99%

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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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Optical Signals to Monitor the Dynamics of Phonon‐Modified Rabi Oscillations in a Quantum Dot

Klaßen

Reiter

2021

Annalen der Physik

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Semiconductor quantum dots are solid state few‐level systems which can interact strongly with light. As such, they can be used as a single photon source or to perform solid‐state quantum‐optics experiments. A major difference to atoms is the interaction with the lattice vibrations, that is, the phonons, which strongly affect the optical signals from a quantum dot. In this paper, we calculate the time‐resolved pump‐probe signals from a continuously driven quantum dot accounting for detuned excitation and electron–phonon interaction. We provide analytical equations giving insight into the different phenomena observed in the spectra like an oscillation between absorptive and dispersive line shapes. For detuned excitation, the electron–phonon interaction can lead to phonon‐assisted occupation of the exciton, giving rise to a strong asymmetry in the dynamical behavior depending on the sign of the detuning. The time‐resolved spectra monitor this relaxation path, which helps understanding the effect of electron–phonon interaction in quantum dots.

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Phonon-Induced Rabi-Frequency Renormalization of Optically Driven SingleInGaAs/GaAsQuantum Dots

Cited by 206 publications

References 25 publications

On-demand semiconductor single-photon source with near-unity indistinguishability

On-demand semiconductor single-photon source with near-unity indistinguishability

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

Optical Signals to Monitor the Dynamics of Phonon‐Modified Rabi Oscillations in a Quantum Dot

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