Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 63: Poster: Quantum Dots and Optics

HL 63.57: Poster

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

Design and Fabrication of a Double Quantum Dot System with Two Independent Charge Detectors — •Friso Öhlschläger, Johannes C. Bayer, Timo Wagner, Eddy P. Rugeramigabo, and Rolf J. Haug — Institut für Festkörperphysik, Leibniz Universität Hannover

We designed a tunable system of two tunnel-coupled quantum dots in series. The fabrication procedure includes optical lithography as well as electron beam lithography on an MBE-grown GaAs/AlGaAs heterostructure forming a 2DEG 110 nm beneath the surface. High tunability should be achieved using standard split gate technique. The quantum dots are then electrostatically defined by applying negative potentials to each gate. We designed a specific double quantum dot system (DQD) with two separate quantum point contacts enabling independent and simultaneous real-time detection of single electron tunneling events in the DQD. This allows the investigation of many different phenomena including feedback experiments [1].
T. Wagner, et al., Nature Nanotechnology (2016)