Dresden 2011 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 44: Poster Session I
HL 44.34: Poster
Dienstag, 15. März 2011, 18:00–21:00, P3
Photoluminescence spectra of weakly n-doped GaAs in view of spin noise spectroscopy — •Carsten Schulte1, Jens Hübner1, Dirk Reuter2, Andreas Wieck2, and Michael Oestreich1 — 1Institute for Solid State Physics, Leibniz Universität Hannover, Appelstr. 2, D-30167 Hannover, Germany — 2Chair for Applied Solid State Physics, Ruhr-Universität Bochum, D-44780 Bochum, Germany
We measure the photoluminescence signal of a weakly n-doped GaAs sample (nD≤1014 cm−3) in preparation of prospective spin noise spectroscopy (SNS) on non-interacting donor spins. Spin noise spectroscopy [1] is a powerful tool in semiconductor quantum optics and is capable of delivering important information on the dynamics of non-interacting spins with the long-term goal of entangled electron spin ensembles in semiconductors. The spin noise spectra provide valuable information on the dominant limitation of the spin relaxation time due to hyperfine interaction with nuclear spins. The photoluminescence and transmission spectra are used to select the sample and determining its suitability for the entanglement of spin ensembles.
[1] G. M. Müller, M. Oestreich, M. Römer, and J. Hübner, Semiconductor spin noise spectroscopy: Fundamentals, accomplishments, and challenges, Physica E 43, 569 (2010).