Freiburg 2019 – wissenschaftliches Programm
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FM: Fall Meeting
FM 8: Enabling Technologies: Sources of Quantum States of Light I
FM 8.2: Talk
Montag, 23. September 2019, 14:30–14:45, 1010
Deterministic integration of QDs into on-chip multimode interference couplers via in-situ electron beam lithography — Peter Schnauber1, •Johannes Schall1, Samir Bounouar1, Jin-Dong Song2, Theresa Höhne3, Sven Burger3, Tobias Heindel1, Sven Rodt1, and Stephan Reitzenstein1 — 1Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany — 2Korea Institute of Science and Technology, Seoul, Korea — 3Zuse Institut Berlin, Freie Universität Berlin, Berlin, Germany
The deterministic integration of quantum emitters into on-chip photonic elements is crucial for the implementation of scalable on-chip quantum circuits. Recent activities include multistep-lithography [1] as well as AFM tip transfer [2]. Here we report on the deterministic integration of single QDs into on-chip beam splitters using single step in-situ electron beam lithography [3]. In order to realize 50/50 coupling elements acting as central building blocks of on-chip quantum circuits we chose tapered multimode interference (MMI) splitters which feature relaxed fabrication tolerances and robust 50/50 splitting ratio. We demonstrate the functionality of the deterministic QD-waveguide structures by μPL spectroscopy and photon cross-correlation between the two MMI output ports. The latter confirms single-photon emission and on-chip splitting associated with g(2)(0) < 0.5 [4].
[1] Coles et al., Nature Communications 7, 11183 (2016)
[2] Zadeh et al., Nano Letters 16, 2289 (2016)
[3] Gschrey et al., Nature Communications 6, 7662 (2015)
[4] Schnauber et al., Nano Letters 18, 2336 (2018)