Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 24: Poster Session II

HL 24.2: Poster

Tuesday, March 13, 2018, 18:30–20:30, Poster F

Deterministic integration of QDs into advanced on-chip photonic elements with in-situ electron beam lithography — •Johannes Schall¹, Peter Schnauber¹, Samir Bounouar¹, Jin-Dong Song², Sven Rodt¹, and Stephan Reitzenstein¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany — ²Korea Institute of Science and Technology, Seoul, Korea

Deterministic integration of quantum emitters into on-chip photonic circuits is a crucial step towards scalable quantum optics. Using in-situ electron beam lithography [1], we present a one-step process for the spectrally and spatially controlled integration of quantum dots (QD) into on-chip photonic elements. We prove the basic functionality of our approach by integrating preselected QDs into waveguides and 50/50 multimode interference (MMI) splitters, measuring single photon emission on-chip. We further discuss a variety of advanced photonic structures that can be realized having full spectral and spatial control during integration. This includes resonators and mode converter approaches to increase the coupling of QD emission to the guided mode[2]. Furthermore, it allows the realization of chiral waveguides, where a controlled displacement of the QD inside the WG is necessary, and enables interfacing two QDs with identical exciton energy inside a single waveguide[3].

[1] Gschrey et al., Nature Communications 6, 7662 (2015)

[2] Davanco et al., Nature Communications 8, 889 (2017)

[3] Coles et al., Nature Communications 7, 11183 (2016)