Regensburg 2022 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 25: Poster 1

HL 25.70: Poster

Mittwoch, 7. September 2022, 18:00–20:00, P2

Grating Couplers on a III-V Semiconductor Platform for Single-Photon Applications — •Valentino Merkl, Stephanie Bauer, Robert Sittig, Simone Luca Portalupi, Michael Jetter, and Peter Michler — Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart

Photonic quantum computing is one of the most studied fields of the 21st century, with the potential to revolutionize computation as we know it today. Using integrated quantum photonics to miniaturize setups, it is possible to increase the computation complexity drastically. For this purpose a III-V semiconductor platform is highly advantageous, as it enables the possibility of integrating quantum dots as single photon sources, which cannot be done on silicon based platforms. They utilize the beneficial aspects of non-classical light for the computation. In some applications it is necessary to couple light from a chip into single mode fibers or vice versa. For this purpose, grating couplers, which demonstrated high coupling efficiencies of up to 89% on the silicon platform, are a highly versatile and promising method. In this contribution, we will present simulation results, fabrication steps and measurements on grating couplers constructed on the GaAs/AlOx platform. Using 2D and 3D FDTD simulations, these structures are optimized to have high coupling efficiencies in the near infrared regime and common telecom frequencies matching the emission wavelength of the QDs.

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