Regensburg 2004 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 6: Photonische Kristalle I

HL 6.1: Vortrag

Montag, 8. März 2004, 12:45–13:00, H15

Space-dependent optical and electronic properties of semiconductor photonic-crystal structures — •B. Pasenow, M. Reichelt, T. Meier, T. Stroucken, P. Thomas, and S.W. Koch — Fachbereich Physik und Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität, Renthof 5, D-35032 Marburg

The optical and electronic properties of a semiconductor heterostructure are modified in the vicinity of a structured dielectric environment, e.g., a photonic crystal [1-3]. In such structures the band gap and the Coulomb interaction potential are space dependent, which results in a spatial variation of the spectral position of the exciton resonance and its binding energy [2]. Therefore one can create spatially non-homogeneous carrier distributions by spectrally selective optical excitation [3]. Following the excitation, the carrier distributions show initially an interesting coherent wave packet dynamics, before they eventually approach an incoherent thermal quasi-equilibrium distribution.

[1] T. Stroucken, R. Eichmann, L. Banyai, and S.W. Koch, J. Opt. Soc. Am. B 19, 2292 (2002).

[2] R. Eichmann, B. Pasenow, T. Meier, T. Stroucken, P. Thomas, and S.W. Koch, Appl. Phys. Lett. 82, 355 (2003).

[3] Semiconductor Optics in Photonic Crystal Structures, T. Meier and S.W. Koch, to appear in Photonic Crystals - Advances in Design, Fabrication and Characterization, Eds. K. Busch, S. Lölkes, R.B. Wehrspohn, and H. Föll, Wiley, 2004.