Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 83: Poster: Enabling Technologies Sources of Quantum States of Light

FM 83.10: Poster

Donnerstag, 26. September 2019, 16:30–18:30, Tents

Growth and Characterization of Quantum Dot Molecules — •Nikolai Bart¹, Ismail Bölükbasi¹, Christian Dangel², Jonathan Finley², Kai Müller², Arne Ludwig¹, and Andreas D. Wieck¹ — ¹Ruhr-Universität Bochum, Lehrstuhl für Angewandte Festkörperphysik, Universitätsstraße 150, 44801 Bochum — ²Technische Universität München, Walter Schottky Institut, Am Coulombwall 4, 85748 Garching bei München

Quantum repeaters and storage devices are crucial requirements for efficient quantum communication. One possible materials system for these are, along color centers and trapped ions, semiconductor quantum dots (QDs). We examine the molecular-beam-epitaxy-growth and optoelectronic properties of two coupled layers of InAs QDs on GaAs, acting as QD molecules. We show that coupling of the two layers can be achieved by adjusting emission wavelengths of direct and indirect exciton recombinations via size modification and electrical tuning.