Berlin 2005 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 37: Photonische Kristalle I
HL 37.1: Vortrag
Montag, 7. März 2005, 10:00–10:15, TU P270
Enhanced light-matter interaction in semiconductor quantum wells embedded in one-dimensional photonic crystals — •Bernhard Pasenow1, Matthias Reichelt1, Tineke Stroucken1, Torsten Meier1, Stephan W. Koch1, Armis R. Zakharian2, and Jerome V. Moloney2 — 1Department of Physics and Material Sciences Center, Philipps University, Renthof 5, D-35032 Marburg — 2Arizona Center for Mathematical Sciences, University of Arizona, Tucson, AZ 85721, USA
The development of photonic crystals has offered novel possibilities to improve the characteristics of optoelectronic devices such as light-emitting diodes and lasers. Here, we analyze the optical properties of semiconductor quantum wells embedded in one-dimensional photonic crystals using a microscopic theory. It is shown that the linear optical spectra of such structures exhibit signatures of non-perturbative light-matter coupling if the exciton is resonant with a field mode that occurs slightly below the optical gap. Due to light focusing and slow light propagation, optical gain enhancement is predicted, exceeding that of a homogeneous medium by more than one order of magnitude. If the structures are placed inside a microcavity, the gain increases superlinearly with the number of wells and for more than five wells exceeds the gain of a corresponding vertical-cavity surface-emitting laser.
[1] B. Pasenow, M. Reichelt, T. Stroucken, T. Meier, S.W. Koch, A.R. Zakharian, and J.V. Moloney, submitted.