Berlin 2018 – wissenschaftliches Programm
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TUT: Tutorials
TUT 4: Semiconductor Optics (joint session HL/TUT)
TUT 4.2: Tutorium
Sonntag, 11. März 2018, 16:50–17:35, H 1058
Non-classical light emission and superradiant emitter coupling in semiconductor nanolasers — •Frank Jahnke — Institute for Theoretical Physics, University of Bremen, 28334 Bremen, Germany
Quantum effects of the light-matter interaction in nanolasers can lead to highly unusual effects not known in conventional lasers, such as a strongly reduced laser threshold and non-classical light emission. The emission properties can be characterized using the second-order photon correlation function g(2). Lasers usually exhibit a change from g(2)=2 for thermal light to g(2)=1 for coherent emission. For a nanolaser with a small number of atom-like quantum-dot emitters in an optical cavity we demonstrate that radiative coupling of the emitters via the cavity field can establish a superradiant state of the active material, which reveals itself via a giant photon bunching with g(2)>>2 in the emitted radiation. Furthermore, superradiant pulse emission and excitation trapping are demonstrated for quantum-dot based nanolasers.
[1] J. Wiersig, C. Gies, F. Jahnke, M. Aßmann, T. Berstermann, M. Bayer, C. Kistner, S. Reitzenstein, C. Schneider, S. Höfling, A. Forchel, C. Kruse, J. Kalden, and D. Hommel, Nature 460, 245 (2009).
[2] F. Jahnke, C. Gies, M. Aßmann, M. Bayer, H.A.M. Leymann, A. Foerster, J. Wiersig, C. Schneider, M. Kamp, and S. Höfling, Nature Communications 7, 11540 (2016).