Erlangen 2022 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 53: Nano-Optics II

Q 53.4: Talk

Thursday, March 17, 2022, 14:45–15:00, Q-H11

Colloidal quantum dots as integrated single photon sources — •Alexander Eich, Tobias Spiekermann, Helge Gehring, Lisa Sommer, Julian Bankwitz, Wolfram Pernice, and Carsten Schuck — Institute of physics, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany

The integration of nano-scale quantum emitters with photonic integrated circuits holds great promise for realizing a scalable quantum technology platform. However, interfacing large numbers of independently controllable single emitter systems efficiently with nanophotonic structures for quantum technologies is a major challenge.

In our work, we employ colloidal quantum dots as single photon emitter system that can be processed in solution at wafer-scale. We embed such quantum dots into tantalum pentoxide (Ta2O5) nanophotonic waveguides by utilizing lithographically patterned apertures in polymer thin-films that achieve high overlay accuracy with nanophotonic devices. We further employ broad-band polymer coupling structures produced in 3D direct laser writing 1 as fiber-chip interconnects and demonstrate anti-bunching behavior for the photoluminescence collected from waveguide-integrated quantum dots 2. Our work paves the way towards large-scale integration of quantum light sources into photonic integrated circuits. [1] Gehring, Helge, et al., Optics letters 44.20 (2019): 5089-5092. [2] Eich, Alexander, et al, arXiv preprint arXiv:2104.11830 (2021).