Impact of Phonons on Dephasing of Individual Excitons in Deterministic Quantum Dot Microlenses.
Tomasz Jakubczyk,Tomasz Jakubczyk,V. Delmonte,V. Delmonte,Sarah Fischbach,Daniel Wigger,Doris E. Reiter,Q. Mermillod,Q. Mermillod,Peter Schnauber,Arsenty Kaganskiy,Jan-Hindrik Schulze,André Strittmatter,Sven Rodt,Wolfgang Werner Langbein,Tilmann Kuhn,Stephan Reitzenstein,Jacek Kasprzak,Jacek Kasprzak +18 more
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This work deterministically fabricates microlenses above selected InAs quantum dots, achieving their efficient coupling to the external light field, and consistently explains the initial coherence decay, the zero-phonon line fraction, and the line shape of the phonon-assisted PL using realistic quantum dot geometries.Abstract:
Optimized light–matter coupling in semiconductor nanostructures is a key to understand their optical properties and can be enabled by advanced fabrication techniques Using in situ electron beam lithography combined with a low-temperature cathodoluminescence imaging, we deterministically fabricate microlenses above selected InAs quantum dots (QDs), achieving their efficient coupling to the external light field This enables performing four-wave mixing microspectroscopy of single QD excitons, revealing the exciton population and coherence dynamics We infer the temperature dependence of the dephasing in order to address the impact of phonons on the decoherence of confined excitons The loss of the coherence over the first picoseconds is associated with the emission of a phonon wave packet, also governing the phonon background in photoluminescence (PL) spectra Using theory based on the independent boson model, we consistently explain the initial coherence decay, the zero-phonon line fraction, and the line read more
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Semiconductor quantum dots as an ideal source of polarization-entangled photon pairs on-demand: a review
TL;DR: In this article, the authors review the relevant experiments which have led to these important discoveries and discuss the remaining challenges for the anticipated quantum technologies, as well as the remaining opportunities for quantum information science and technology.
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Single Quantum Dot with Microlens and 3D-Printed Micro-objective as Integrated Bright Single-Photon Source
Sarah Fischbach,Alexander Schlehahn,Alexander Thoma,Nicole Srocka,Timo Gissibl,Simon Ristok,Simon Thiele,Arsenty Kaganskiy,André Strittmatter,Tobias Heindel,Sven Rodt,Alois Herkommer,Harald Giessen,Stephan Reitzenstein +13 more
TL;DR: A bright single-photon source realized by on-chip integration of a deterministic quantum dot microlens with a 3D-printed multilens micro-objective to highlight the opportunities that arise from tailoring the optical properties of quantum emitters using integrated optics.
Journal ArticleDOI
Phonon-assisted emission and absorption of individual color centers in hexagonal boron nitride
Daniel Wigger,Robert Schmidt,Osvaldo Del Pozo-Zamudio,Osvaldo Del Pozo-Zamudio,Johann A. Preuß,Philipp Tonndorf,Robert Schneider,Paul Steeger,Johannes Kern,Yashar Khodaei,Jaroslaw Sperling,Steffen Michaelis de Vasconcellos,Rudolf Bratschitsch,Tilmann Kuhn +13 more
TL;DR: In this paper, the phonon side bands can be well described in terms of the coupling to bulk longitudinal optical (LO) phonons, and it is shown that the excitation of the emitters is most efficient by LO-phonon assisted absorption.
Journal ArticleDOI
Non-Markovian features in semiconductor quantum optics: quantifying the role of phonons in experiment and theory
TL;DR: In this article, the authors discuss phonon-induced non-Markovian and Markovian features in QD-based optics, including lineshapes in linear absorption experiments, phononinduced incoherence in the Heitler regime, and memory correlations in two-photon coherences.
Journal ArticleDOI
Distinctive characteristics of carrier-phonon interactions in optically driven semiconductor quantum dots
TL;DR: In this article, the carrier-phonon coupling in self-assembled semiconductor quantum dot quantum dots is discussed. But the authors focus on the unique characteristics arising from the unique nature of the coupling.
References
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Unidirectional emission of a quantum dot coupled to a nanoantenna
Alberto G. Curto,Giorgio Volpe,Tim H. Taminiau,Mark P. Kreuzer,Romain Quidant,Niek F. van Hulst +5 more
TL;DR: An optical antenna is designed, a shrunk-down version of the Yagi-Uda design used in microwave and radio communication, and it is shown that coupling the quantum dot to the antenna provides control over the direction of the emitted light.
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A highly efficient single-photon source based on a quantum dot in a photonic nanowire
Julien Claudon,Joël Bleuse,N. S. Malik,M. Bazin,Périne Jaffrennou,Niels Gregersen,Christophe Sauvan,Philippe Lalanne,Jean-Michel Gérard +8 more
TL;DR: In this paper, an InAs quantum dot embedded in a GaAs photonic nanowire with carefully tailored ends was used to achieve a record source efficiency of 0.72, combined with pure single-photon emission.
Journal ArticleDOI
Ultralong Dephasing Time in InGaAs Quantum Dots
Paola Borri,Wolfgang Werner Langbein,S. Schneider,Ulrike Woggon,Roman Sellin,D. Ouyang,Dieter Bimberg +6 more
TL;DR: Between 7 and 100 K the polarization decay has two distinct components resulting in a non-Lorentzian line shape with a lifetime-limited zero-phonon line and a broadband from elastic exciton-acoustic phonon interactions.
Journal ArticleDOI
On-Demand Single Photons with High Extraction Efficiency and Near-Unity Indistinguishability from a Resonantly Driven Quantum Dot in a Micropillar.
Xing Ding,Yu He,Zhao-Chen Duan,Niels Gregersen,Ming-Cheng Chen,Sebastian Unsleber,Sebastian Maier,Christian Schneider,Martin Kamp,Sven Höfling,Sven Höfling,Sven Höfling,Chao-Yang Lu,Jian-Wei Pan +13 more
TL;DR: By s-shell pulsed resonant excitation of a Purcell-enhanced quantum dot-micropillar system, deterministically generate resonance fluorescence single photons which, at π pulse excitation, have an extraction efficiency of 66, single-photon purity of 99.1%, and photon indistinguishability of 98.5%.
Journal ArticleDOI
Theory of pure dephasing and the resulting absorption line shape in semiconductor quantum dots
TL;DR: In this paper, the pure dephasing of the optical polarization and the corresponding line shape of absorption spectra in small quantum dots due to the interaction of the exciton both with optical and acoustic phonons is calculated.