Berlin 2012 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 25: Poster Session: GaN - Optical Properties & Preparation and Characterization & Devices

HL 25.4: Poster

Montag, 26. März 2012, 16:00–19:00, Poster D

Resonance Raman and Selection Rules in Cuprous Oxide — •Ovidiu Dorin Gordan, Salvan Georgeta, Schäfer Philipp, Fronk Michael, and Dietrich R.T. Zahn — Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany

Long known as a red pigment, cuprous oxide (Cu₂O) is one of the principal oxides of copper which crystallizes in a cubic structure. Even though Raman studies of Cu₂O in resonance conditions were reported in several papers, the relative intensities and the origin of the spectral features is still under debate. In this work natural, one side polished (100), (110), and (111) terminated Cu₂O single crystals purchased from SurfaceNet GmbH are investigated using a micro-Raman configuration. The selection rules in resonance conditions are revisited using parallel and cross polarization configurations for two different excitation energies, 2.41 eV and 3.82 eV, which probe in resonance with different excitonic transitions.