Phonon-Mediated Coupling of<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-Dot Excitons to Photonic Crystal Cavities

Calic, M.; Gallo, Pascal; Felici, Marco; Atlasov, Kirill A.; Dwir, B.; Rudra, A.; Biasiol, G.; Sorba, L.; Tarel, Guillaume; Savona, Vincenzo; Kapon, E.

doi:10.1103/physrevlett.106.227402

Cited by 93 publications

(96 citation statements)

References 33 publications

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“…Acoustic phonon processes also play an important role in incoherently pumped cavity-QED systems which are known to result in off-resonant "cavity feeding" [30][31][32][33][34][35][36][37] , an effect which also exists (and is particularly strong) in coherently driven systems 28,29 . There have been several attempts at an improved theoretical description of a semiconductor cavity-QED system to include the effects of electron-acosutic-phonon scattering 34,[38][39][40][41][42][43] .…”

Section: Introductionmentioning

confidence: 99%

Polaron master equation theory of the quantum-dot Mollow triplet in a semiconductor cavity-QED system

2012

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We present a comprehensive theoretical study of the resonance fluorescence spectra of an excitondriven quantum dot (QD) placed inside a high-Q semiconductor cavity and interacting with an acoustic phonon bath. We derive a quantum master equation (ME) in the polaron frame which includes exciton-phonon and exciton-cavity coupling to all orders. This work details and extends the theory used in a recent issue of Physical Review Letters (C. Roy and S. Hughes 2011: Phys. Rev. Lett. 106 247403) to describe the QD Mollow triplet in the regime of semiconductor cavity-QED. Here we introduce two ME forms, Nakajima-Zwanzig (NZ) and time-convolutionless (TC), both to second order in the system-phonon-reservoir perturbation. In the polaron frame, these two ME forms are shown to yield equivalent population dynamics and fluorescence spectra for a continuous wave (cw) driving field. We also demonstrate that a Markov approximation is valid for computing the incoherent scattering processes and we subsequently exploit the Markovian TC ME to explore the resonance fluorescence spectra of an exciton-driven QD. Both cavity-emitted and exciton-emitted spectra are studied and these are found to have qualitatively different spectral features. Using a coherent driving field, the well known characteristics of the atomic Mollow triplet are shown to be considerably modified with electron-acoustic-phonon scattering and we highlight the key effects arising from both cavity coupling and electron-phonon coupling. Regimes of pronounced cavity feeding and anharmonic cavity-QED are exemplified, and we find that the cavity coupling depends sensitively on the exciton-cavity detuning and the temperature of the phonon bath. We show how the full width at half maximum (linewidth) of the Mollow triplet sidebands varies as a function of the square of the Rabi frequency of the cw pump. Phonon-mediated cavity coupling also contributes to the spectral broadening of the Mollow triplet, depending upon the exciton-cavity detuning and the strength of the exciton-cavity coupling rate. Finally, we calculate the fluorescence spectra for off-resonance cw driving and investigate the resulting Mollow-triplet linewidths.

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Section: Introductionmentioning

confidence: 99%

Polaron master equation theory of the quantum-dot Mollow triplet in a semiconductor cavity-QED system

2012

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“…4,5 Cavity quantum-electrodynamics (QED) experiments in solid-state systems have yielded major breakthroughs within the last decade, including the observation of Purcell enhancement, 6,7 strong coupling between a single QD and a photon, 8,9 and non-Markovian dynamics. 10 A number of surprises have emerged, distinguishing QD-based QED from its atomic counterpart, including the breakdown of the pointdipole description of light-matter interaction, 11 the role of phonon dephasing, [12][13][14] and multiple-charge transitions. 15,16 In this paper, we explore the role of environmental fluctuations by employing a QD embedded in a nanocavity as a sensitive probe of the phonon dephasing processes in a photoniccrystal (PC) nanomembrane.…”

Section: Introductionmentioning

confidence: 99%

Measuring the effective phonon density of states of a quantum dot in cavity quantum electrodynamics

et al. 2013

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(2013). Measuring the effective phonon density of states of a quantum dot in cavity quantum electrodynamics. Physical Review B Condensed Matter, 88(4) We employ detuning-dependent decay-rate measurements of a quantum dot in a photonic-crystal cavity to study the influence of phonon dephasing in a solid-state quantum-electrodynamics experiment. The experimental data agree with a microscopic non-Markovian model accounting for dephasing from longitudinal acoustic phonons, and the analysis explains the difference between nonresonant cavity feeding in different nanocavities. From the comparison between experiment and theory we extract the effective phonon density of states experienced by the quantum dot in the nanocavity. This quantity determines all phonon dephasing properties of the system and is found to be described well by a theory of bulk phonons.

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“…Also for dots in cavities phonons can play a decisive role, e.g., for the dephasing [87,88,89,90,91], the photon statistics [92,58,93,94], the indistinguishability of photons [95] as well as for providing a dot-cavity coupling in the case of non-resonant QD and cavity modes where phenomena like off-resonant cavity feeding have been found [96,82,97,98,99,100,101,102]. Although such systems are not at the focus of the present review, we note in passing that in this case, additional relaxation mechanisms, in particular cavity losses, may become of importance.…”

Section: Quantum Dot Modelmentioning

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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Phonon-Mediated Coupling ofInGaAs/GaAsQuantum-Dot Excitons to Photonic Crystal Cavities

Cited by 93 publications

References 33 publications

Polaron master equation theory of the quantum-dot Mollow triplet in a semiconductor cavity-QED system

Polaron master equation theory of the quantum-dot Mollow triplet in a semiconductor cavity-QED system

Measuring the effective phonon density of states of a quantum dot in cavity quantum electrodynamics

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

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