Regensburg 2025 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 29: Poster II

HL 29.70: Poster

Tuesday, March 18, 2025, 18:00–20:00, P1

Towards scalable quantum circuits based on microlaser-pumped quantum emitters — •Maximilian Klonz, Aris Koulas-Simos, Léo Roche, Imad Limame, Sven Rodt, and Stephan Reitzenstein — Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany

We report on activities towards the development of a scalable technology platform for integrated quantum photonic circuits (IQPCs) based on semiconductor quantum dots, which are deterministically integrated into photonic waveguides by in-situ electron beam lithography [1], acting as single-photon emitters. Photons, generated by these on-demand quantum emitters, serve as flying qubits in quantum communication systems and as input states for photonic quantum computing [2, 3]. Here, we present innovative technological approaches for a two-step epitaxial growth method to achieve areas with low and high density of quantum dots to further fabricate lasers and single-photon sources monolithically integrated on the same wafer. We show simulations towards a scheme for optical on-chip pumping of these single-photon emitters and first experimental results.

References
[1] P. Schnauber et al., Nano Letters 18, 2336 (2019)
[2] T. Heindel et al., Advances in Optics and Photonics 15, 613 (2023)
[3] S. Rodt and S. Reitzenstein., APL Photonics 6, 010901 (2021)

Keywords: integrated quantum photonic circuits; photonic waveguides; on-demand quantum emitters; photonic quantum computing