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HL: Fachverband Halbleiterphysik

HL 63: Poster: Quantum Dots and Optics

HL 63.46: Poster

Mittwoch, 22. März 2017, 15:00–19:00, P1A

Optical and Electronic Characterization of Coupled Quantum Dots — •Clara Junggebauer¹, Shovon Pal², Sascha R. Valentin¹, Sven Scholz¹, Andreas D. Wieck¹, and Arne Ludwig¹ — ¹Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, Germany — ²NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Pisa, Italy

Self-assembled quantum dots are promising candidates for the development of quantum information processing units like quantum bits, single photon sources or quantum memories. Coupled quantum dots, also called quantum dot molecules (QDM) in a semiconductor solid state matrix allow for controlled charging and tuning of the electronic energy level's coupling. The research so far is mostly done in other works by optical spectroscopy on single QDMs. Here, we present capacitance-voltage spectroscopy with and without illumination to access electronically the energy level structure of a QDM ensemble coupled to an electron reservoir. This is possible due to a high size homogeneity of the prepared QDM ensembles.