Dresden 2011 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 85: Poster Session II

HL 85.106: Poster

Donnerstag, 17. März 2011, 18:00–21:00, P4

Spin noise spectroscopy of single semiconductor quantum dots — •Ramin Dahbashi¹, Michael Schmidt¹, Klaus Pierz², Hans Werner Schuhmacher², Jens Hübner¹, and Michael Oestreich¹ — ¹Institute for Solid State Physics, Leibniz Universität Hannover, Appelstr. 2, D-30167 Hannover, Germany — ²Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany

We demonstrate spin noise spectroscopy [1] as a technique for the nearly perturbation free measurement of the electron spin dynamics in single semiconductor quantum dots charged with one electron or one hole. The investigated sample are InAs quantum dots with a density gradient enclosed in a Bragg mirror cavity. The charge status is determined via the spectral and polarization dependence of the photoluminescence. We present preparatory photoluminescence measurements to ensure that we can detect single quantum dot photoluminescence. The measurements are set up in a self-designed sample rod for ordinary helium bottles to realise an intrinsically stable, low temperature measurement system with direct optical access.

[1] G. M. Müller, M. Oestreich, M. Römer, and J. Hübner, Semiconductor spin noise spectroscopy: Fundamentals, accomplishments, and challenges, Physica E 43, 569 (2010).