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Main Title: Emission from quantum-dot high-β microcavities: transition from spontaneous emission to lasing and the effects of superradiant emitter coupling
Author(s): Kreinberg, Sören
Chow, Weng W.
Wolters, Janik
Schneider, Christian
Gies, Christopher
Jahnke, Frank
Höfling, Sven
Kamp, Martin
Reitzenstein, Stephan
Type: Article
Language Code: en
Abstract: Measured and calculated results are presented for the emission properties of a new class of emitters operating in the cavity quantum electrodynamics regime. The structures are based on high-finesse GaAs/AlAs micropillar cavities, each with an active medium consisting of a layer of InGaAs quantum dots (QDs) and the distinguishing feature of having a substantial fraction of spontaneous emission channeled into one cavity mode (high β-factor). This paper demonstrates that the usual criterion for lasing with a conventional (low β-factor) cavity, that is, a sharp non-linearity in the input–output curve accompanied by noticeable linewidth narrowing, has to be reinforced by the equal-time second-order photon autocorrelation function to confirm lasing. The paper also shows that the equal-time second-order photon autocorrelation function is useful for recognizing superradiance, a manifestation of the correlations possible in high-β microcavities operating with QDs. In terms of consolidating the collected data and identifying the physics underlying laser action, both theory and experiment suggest a sole dependence on intracavity photon number. Evidence for this assertion comes from all our measured and calculated data on emission coherence and fluctuation, for devices ranging from light-emitting diodes (LEDs) and cavity-enhanced LEDs to lasers, lying on the same two curves: one for linewidth narrowing versus intracavity photon number and the other for g(2)(0) versus intracavity photon number.
Issue Date: 28-Feb-2017
Date Available: 4-May-2020
DDC Class: 530 Physik
Subject(s): coherence
laser physics
photon statistics
quantum dots
quantum optics
Sponsor/Funder: EC/FP7/615613/EU/External Quantum Control of Photonic Semiconductor Nanostructures/EXQUISITE
DFG, 43659573, SFB 787: Halbleiter - Nanophotonik: Materialien, Modelle, Bauelemente
Journal Title: Light: Science & Applications
Publisher: Springer Nature
Publisher Place: London
Volume: 6
Article Number: e17030
Publisher DOI: 10.1038/lsa.2017.30
EISSN: 2047-7538
Appears in Collections:AG Optoelektronik und Quantenbauelemente » Publications

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