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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 Zybell^2,3, Stephan Winnerl², Jayeeta Bhattacharyya², Faina Esser^2,3, Harald Schneider², Manfred Helm^2,3, William D. Rice⁴, and Junichiro Kono⁴ — ¹Department 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).