Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 35: Poster I

HL 35.12: Poster

Dienstag, 8. März 2016, 15:00–19:00, Poster A

Stokes Polarimetry of Magnetic Linear Birefringence in Gallium Arsenide — •Pavel Sterin, Fabian Berski, Agnes Beichert, Jens Hübner, and Michael Oestreich — Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstr. 2, D-30167 Hannover, Germany

Recently, an intriguing excitation mechanism of spin polarized carriers by linearly polarized light was observed in non-centrosymmetric InGaAs. Interestingly, the experimental signatures were interpreted as two dimensional control of the electron spin orientation. [1] However, for an in-depth understanding we employ a highly sensitive, self-built polarimeter and explore the interplay of oblique light propagation and linear birefringence caused by an applied magnetic field. A generalized Mueller-matrix approach allows us to recover unambiguously the complete polarization state of the transmitted laser light. Moreover, the ellipticity and orientation as function of angle of incidence and magnetic field strength are investigated using a 4×4-matrix formalism. [2] Finally, first measurements on well-known gallium arsenide prove the general suitability of our method.

[1] K. Schmalbuch, S. Göbbels, P. Schäfers, C. Rodenbücher, P. Schlammes, T. Schäpers, M. Lepsa, G. Güntherodt, B. Beschoten, Phys. Rev. Lett., 105, 246603 (2010)

[2] D. W. Berreman, JOSA 62 502-510 (1972)