Regensburg 2022 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 30: Poster 2
HL 30.52: Poster
Donnerstag, 8. September 2022, 11:00–13:00, P3
Numerical studies of on-chip grating couplers for integrated semiconductor entangled photon sources — •Constantin Schmidt1, Chenxi Ma1, Jingzhong Yang1, Michael Zopf1, Eddy Patrick Rugeramigabo1, and Fei Ding1,2 — 1Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, Germany — 2Laboratorium für Nano- und Quantenengineering, Leibniz Universität Hannover, Schneiderberg 39, 30167 Hannover, Germany
Integrating single photon and entangled photon pair emitters such as epitaxially grown semiconductor quantum dots into photonic frameworks is a rapidly evolving research field. Quantum states of light generated by these non-classical sources can be routed and manipulated within on-chip nanostructures while simultaneously enhancing their quantum optical fingerprints. Due to the high refractive index contrast between the semiconductor host and the surrounding environment, efficient out-coupling of this non-classical light for off-chip processing and detection requires carefully engineered mesoscopic structures. Here, we present high-efficiency Bragg gratings for an enhanced outcoupling efficiency of light from within hybrid photonic nanostructures. The photon wavelength under consideration is 780 nm resembling the 87Rb D2 line, corresponding to the emission from GaAs/AlGaAs quantum dots. The presented numerical study helps to enable such sources for applications in complex quantum optical networks.