Emission from quantum-dot high-β microcavities: transition from spontaneous emission to lasing and the effects of superradiant emitter coupling

Kreinberg, Sören; Chow, Weng W.; Wolters, Janik; Schneider, Christian; Gies, Christopher; Jahnke, Frank; Höfling, Sven; Kamp, Martin; Reitzenstein, Stephan

doi:10.1038/lsa.2017.30

Title: Emission from quantum-dot high-β microcavities: transition from spontaneous emission to lasing and the effects of superradiant emitter coupling

Journal Article · Tue Feb 28 00:00:00 EST 2017 · Light, Science & Applications

DOI:https://doi.org/10.1038/lsa.2017.30· OSTI ID:1398781

Kreinberg, Sören ^[1]; Chow, Weng W. ^[2]; Wolters, Janik ^[1]; Schneider, Christian ^[3]; Gies, Christopher ^[4]; Jahnke, Frank ^[4]; Höfling, Sven ^[5]; Kamp, Martin ^[3]; Reitzenstein, Stephan ^[1]

Technische Univ. Berlin (Germany). Inst. fur Festkorperphysik
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Univ. of Wurzburg (Germany). Lehrstuhl fur Technische Physik
Univ. of St. Andrews, Scotland (United Kingdom). School of Physics and Astronomy
Univ. of Wurzburg (Germany). Lehrstuhl fur Technische Physik; Univ. of St. Andrews, Scotland (United Kingdom). School of Physics and Astronomy

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 article 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.

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Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); European Union (EU); German Research Foundation (DFG)

Grant/Contract Number:: AC04-94AL85000; 615613

OSTI ID:: 1398781

Report Number(s):: SAND-2017-9890J; lsa201730

Journal Information:: Light, Science & Applications, Vol. 6, Issue 8; ISSN 2047-7538

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 71 works

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