SKM 2021 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 8: Poster Session II
HL 8.15: Poster
Dienstag, 28. September 2021, 10:00–13:00, P
Purcell-enhanced single-photon emission from a strain-tunable quantum dot in a cavity-waveguide device — •Florian Hornung1, Stefan Hepp1, Stephanie Bauer1, Erik Hesselmeier1, Xueyong Yuan2,3, Michael Jetter1, Simone Luca Portalupi1, Armando Rastelli2, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, 70569 Stuttgart, Germany — 2Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, 4040 Linz, Austria — 3School of Physics, Southeast University, Nanjing, 211189, China
The miniaturization of optical elements to chip-size in so-called photonic integrated circuits has attracted a lot of attention in recent years. Due to its great scalability, the approach seems highly promising for the efficient realization of photon-based quantum technologies.
In this study, we show the coupling of an In(Ga)As quantum dot (QD) to a waveguide-integrated cavity. The chip is bonded to a piezoelectric actuator, enabling the strain-tuning of both the emission energy of the QD and the cavity mode. As the QD is more sensitive to the applied strain, a differential tuning factor of four is obtained, allowing to compensate the initial energy mismatch of the QD and the cavity. A clear Purcell-enhancement as well as the single-photon emission of the device are demonstrated. This combination of a strain-tunable quantum emitter and a waveguide-integrated cavity represents an important building block for large scale quantum photonic circuits.