Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 33: Optical properties I

HL 33.5: Vortrag

Dienstag, 1. April 2014, 10:30–10:45, POT 006

Terahertz control schemes of semiconductor excitons — •Lukas Schneebeli1, Christoph N. Boettge1, Benjamin Breddermann1, Mackillo Kira1, Stephan W. Koch1, Sabine Zybell2,3, Stephan Winnerl2, Jayeeta Bhattacharyya2, Faina Esser2,3, Harald Schneider2, Manfred Helm2,3, William D. Rice4, and Junichiro Kono41Department of Physics, Philipps-Universität Marburg, Renthof 5, D-35032 Marburg, Germany — 2Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119, 01314 Dresden, Germany — 3Technische Universität Dresden, 01062 Dresden, Germany — 4Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA

We analyze recent terahertz (THz) experiments [1] on semiconductor quantum wells with a microscopic theory [2, 3] of THz excitation that systematically includes all relevant many-body interactions. Our results [1] contain an unexpected emission increase to luminescence due to dipole-forbidden intra-excitonic transitions. This many-body effect stems from the Coulomb-interaction induced scattering among excitons. These experimental and theoretical results demonstrate the general manipulation capabilities of THz excitation and the role of Coulomb interaction. We also discuss further control mechanisms of exciton dynamics and present several examples.
W. D. Rice et al., Phys. Rev. Lett. 110, 137404 (2013).
M. Kira and S. W. Koch, Prog. Quantum Electron. 30, 155 (2006).
M. Kira and S. W. Koch: Semiconductor Quantum Optics, 1st. ed., Cambridge Univ. Press, (2011).

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