Berlin 2008 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 17: Poster I

HL 17.20: Poster

Monday, February 25, 2008, 16:30–19:00, Poster D

Characterization of GaSb-based heterostructures by spectroscopic investigations — •Sebastian Imhof, Christina Bückers, Björn Metzger, Angela Thränhardt, Sangam Chatterjee, and Stephan W. Koch — Fachbereich Physik und Wissenschaftliches Zentrum für Materialwissenschaften, Philipps Universität Marburg, Renthof 5, 35032 Marburg

The material system (AlGaIn)(AsSb) is suitable for laser emission at 2µm or longer wavelength, which is interesting for various applications, e.g. material processing, gas detection, medical diagnostic and laser surgery. A wide range of material combinations is being considered for application [1-3], but there are still uncertainties with regards to their structural properties, such as band alignment, strain and general bandstructure parameters. In order to gain information on these structural properties, we investigate GaSb-based heterostructures by modulation spectroscopy using e.g. photomodulated reflection. The experimental data are compared to simulations based on a microscopic theory.
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C. L. Canedy, W. W. Bewley, J. R. Lindle, C. S. Kim, M. Kim, I. Vurgaftman, J. R. Meyer, J. Electron. Mater. 35, 453 (2006)
E. A. Pease, L. R. Dawson, L. G. Vaughn, P. Rotella, and L. F. Lester J. Appl. Phys. 93, 3177 (2003)