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HL: Halbleiterphysik

HL 37: Photonische Kristalle I

HL 37.2: Vortrag

Montag, 7. März 2005, 10:15–10:30, TU P270

Optical properties of semiconductor photonic-crystal structures: Spatially-inhomogeneous excitonic resonances and optical gain — •Torsten Meier, Matthias Reichelt, Bernhard Pasenow, Tineke Stroucken, and Stephan W. Koch — Department of Physics and Material Sciences Center, Philipps University, Renthof 5, D-35032 Marburg

Significant aspects of the light-matter interaction can be tailored in suitably designed systems consisting of semiconductor nanostructures and dielectric photonic crystals. Such effects are described by a microscopic theory which provides a self-consistent solution of the dynamics of the electromagnetic field and the material excitations. The theory is applied to investigate spatially-inhomogeneous excitonic resonances, which arise as a consequence of the modified Coulomb interaction in the vicinity of a structured dielectric medium [1-3]. It is demonstrated that these inhomogeneities lead to distinct modifications of the optical spectra [3].

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

[2] T. Meier and S.W. Koch, in Photonic Crystals - Advances in Design, Fabrication and Characterization, Eds. K. Busch, S. Lölkes, R.B. Wehrspohn, and H. Föll, (Wiley-VCH, Berlin, 2004) pp. 43-62.

[3] M. Reichelt, B. Pasenow, T. Meier, T. Stroucken, and S.W. Koch, submitted.