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HL: Fachverband Halbleiterphysik

HL 7: Poster I

HL 7.62: Poster

Monday, March 27, 2023, 13:00–15:00, P2/EG

Towards remote on-chip two-photon interference in gallium arsenide based-photonic integrated circuits — •Ulrich Pfister¹, Moritz Speidel¹, Florian Hornung¹, Stephanie Bauer¹, Robert Sittig¹, Eric Reutter², Michael Jetter¹, Simone L. Portalupi¹, Jürgen Weis², and Peter Michler¹ — ¹Institut für Halbleiter und Funktionelle Grenzflächen (IHFG), Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, Allmandring 3, Germany — ²Max-Planck-Institut für Festkörperforschung (MPI), University of Stuttgart, Heisenbergstraße 1, Germany

InGaAs quantum dots (QDs) are a promising source of single and indistinguishable photons for the on-chip realization of two-photon interference (TPI) with remote QDs. One of the challenges is the inhomogeneously distributed emission frequency of the QDs, which makes frequency tuning necessary. We show that strain-induced emission frequency tuning is applicable for ridge waveguides and it can be considered a promising step towards remote on-chip TPI [1]. Additionally, a successful TPI with one single QD and an on-chip multimode interference beamsplitter as a part of a Mach*Zehnder interferometer has been realized and the feasibility of remote on-chip TPI with MOVPE-grown InGaAs QDs is discussed.
[1] Hepp, S. et al., Appl. Phys. Lett. 117, 254002 (2020)