Phonon-Assisted Population Inversion of a Single<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>InGaAs</mml:mi><mml:mo>/</mml:mo><mml:mi>GaAs</mml:mi></mml:mrow></mml:math>Quantum Dot by Pulsed Laser Excitation

Quilter, J. H.; Brash, Alistair J.; Liu, Feng; Glässl, Martin; Barth, Andreas M.; Axt, Vollrath M.; Ramsay, Andrew J.; Skolnick, M. S.; Fox, A. M.

doi:10.1103/physrevlett.114.137401

Cited by 149 publications

(146 citation statements)

References 36 publications

(51 reference statements)

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“…The detuning dependent shape of the phonon assisted excitation process results from the asymmetric LA -phonon QD interaction spectrum J(∆ω exc ) discussed in the previous section and Ref. [25,[40][41][42][43]. Note, that for the two-photon excitation scheme presented in the letter, we are blue detuned from the X 0 → 2X 0 transition by ∆ b = 0.92 meV leading to an effective LA -phonon interaction.…”

Section: Phonon Assisted Pump Ratesmentioning

confidence: 99%

“…Most importantly, the resulting charge carrier -phonon interaction spectrum J(∆ω) is highly sensitive to the energy detuning of the excitation laserhω L . Only for positive detunings ∆ω i→j = ω L −ω i→j > 0 of the excitation laser with respect to the optical transition i → j, the spectrum acquires considerable values since LA -phonons are frozen out at low temperatures and phonon emission processes dominate [40][41][42][43]. When the excitation laser resonantly drives cgs →→ 2X 0 , it is blue detuned from 2X 0 → X 0 (∆ω 2X→X 0 = +∆ b > 0) and red detuned from X 0 → cgs (∆ω 2X→X 0 = −∆ b < 0).…”

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confidence: 99%

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Optical control of nonlinearly dressed states in an individual quantum dot

et al. 2016

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We report two-photon resonance fluorescence of an individual semiconductor artificial atom. By non-linearly driving a single semiconductor quantum dot via a two-photon transition, we probe the linewidth of the two-photon processes and show that, similar to their single-photon counterparts, they are close to being Fourier limited at low temperatures. The evolution of the population of excitonic states with the Rabi frequency exhibits a clear s-shaped behavior, indicative of the nonlinear response via the two photon excitation process. We model the non-linear response using a 4-level atomic system representing the manifold of excitonic and biexcitonic states in the quantum dot and show that quantitative agreement is obtained only by including the interaction with LAphonons in the solid state environment. Finally, we demonstrate the formation of dressed states emerging from a two-photon interaction between the artificial atom and the excitation field. The non-linear optical dressing induces a mixing of all four excitonic states that facilitates the tuning of the polarization selection rules of the artificial atom.

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Section: Phonon Assisted Pump Ratesmentioning

confidence: 99%

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confidence: 99%

Optical control of nonlinearly dressed states in an individual quantum dot

et al. 2016

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“…While electron-phonon interactions usually lead to performance degradation of devices, they may also open up possibilities to tune device characteristics by virtue of material and geometry design and appropriate control of ambient properties as well as external parameters. Recent examples of phonon tuning applications include the realization of population inversion in InGaAs quantum dot systems [1][2][3] and phonon-assisted gain in semiconductor quantum dot masers [4][5][6]. It was demonstrated in Refs.…”

Section: Introductionmentioning

confidence: 99%

Unified treatment of coupled optical and acoustic phonons in piezoelectric cubic materials

Willatzen

Wang

2015

Phys. Rev. B

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A unified treatment of coupled optical and acoustic phonons in piezoelectric cubic materials is presented whereby the lattice displacement vector and the internal ionic displacement vector are found simultaneously. It is shown that phonon couplings exist in pairs only; either between the electric potential and the lattice displacement coordinate perpendicular to the phonon wave vector or between the two other lattice displacement components. The former leads to coupled acousto-optical phonons by virtue of the piezoelectric effect. We then establish three new conjectures that entirely stem from piezoelectricity in a cubic structured material slab. First, it is shown that isolated optical phonon modes generally cannot exist in piezoelectric cubic slabs. Second, we prove that confined acousto-optical phonon modes only exist for a discrete set of in-plane wave numbers in piezoelectric cubic slabs. Third, it is shown that coupled acousto-optical phonons do not exist at the longitudinal-optical (LO) phonon frequency where the dielectric constant vanishes.

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“…However, less advantageous distinctions are also present, principally the unavoidable interactions between QD excitonic degrees of freedom and the environment provided by the host material [27][28][29][30][31][32]. These can significantly alter QD optical emission properties [33][34][35][36], which typically reduces performance in quantum photonic devices [37].…”

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confidence: 99%

Limits to coherent scattering and photon coalescence from solid-state quantum emitters

et al. 2017

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. Limits to coherent scattering and photon coalescence from solid-state quantum emitters. Physical Review B, 95(20), [201305] University of Bristol -Explore Bristol Research General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/pure/about/ebr-terms The desire to produce high-quality single photons for applications in quantum information science has lead to renewed interest in exploring solid-state emitters in the weak excitation regime. Under these conditions it is expected that photons are coherently scattered, and so benefit from a substantial suppression of detrimental interactions between the source and its surrounding environment. Nevertheless, we demonstrate here that this reasoning is incomplete, as phonon interactions continue to play a crucial role in determining solid-state emission characteristics even for very weak excitation. We find that the sideband resulting from non-Markovian relaxation of the phonon environment is excitation strength independent. It thus leads to an intrinsic limit to the fraction of coherently scattered light and to the visibility of two-photon coalescence at weak driving, both of which are absent for atomic systems or within simpler Markovian treatments.

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Phonon-Assisted Population Inversion of a SingleInGaAs/GaAsQuantum Dot by Pulsed Laser Excitation

Cited by 149 publications

References 36 publications

Optical control of nonlinearly dressed states in an individual quantum dot

Optical control of nonlinearly dressed states in an individual quantum dot

Unified treatment of coupled optical and acoustic phonons in piezoelectric cubic materials

Limits to coherent scattering and photon coalescence from solid-state quantum emitters

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