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

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

doi:10.1038/lsa.2017.30

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

Original Articles

- Emission from quantum-dot high-β microcavities: transition from spontaneous emission to lasing and the effects of superradiant emitter coupling
- Light: Science & Applications Vol. 6, Issue 3, (2017)
- Affiliations：
  
  1.Institut für Festkörperphysik, Technische Universität Berlin, Berlin 10623, Germany
  2.Sandia National Laboratories, Albuquerque, NM 87185-1086, USA
  3.Lehrstuhl für Technische Physik, Universität Würzburg, Würzburg 97074, Germany
  4.School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, UK
  5.Institute for Theoretical Physics, University of Bremen, Bremen 28334, Germany
- Author bio：
  
  WW Chow, Email: wwchow@sandia.gov
- Funds：
- DOI：10.1038/lsa.2017.30
  CLC：
- Published：2017-09，
  
  Published Online：28 February 2017，
  
  Received：08 August 2016，
  
  Revised：26 February 2017，
  
  Accepted：26 February 2017
- Accepted：
Scan QR Code
Kreinberg, S. et al. Emission from quantum-dot high-β microcavities: transition from spontaneous emission to lasing and the effects of superradiant emitter coupling. Light: Science & Applications, 6, e17030 (2017).
DOI：

Kreinberg, S. et al. Emission from quantum-dot high-β microcavities: transition from spontaneous emission to lasing and the effects of superradiant emitter coupling. Light: Science & Applications, 6, e17030 (2017). DOI： 10.1038/lsa.2017.30.

摘要

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

(2)

(0) versus intracavity photon number.

关键词

Keywords

coherencelaser physicsmicrolasersnanolasersoptoelectronicsphoton statisticsquantum dotsquantum optics

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