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Dresden 2020 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 26: Focus Session: Integrated Quantum Photonics I

HL 26.5: Hauptvortrag

Dienstag, 17. März 2020, 11:15–11:45, POT 51

Fully on-chip single-photon Hanbury-Brown and Twiss experiment integrating semiconductors and superconductors — •Simone Luca Portalupi1, Mario Schwartz1, Ekkehart Schmidt2, Ulrich Rengstl1, Florian Hornung1, Stefan Hepp1, Konstantin Ilin2, Michael Jetter1, Michael Siegel2, and Peter Michler11IHFG-University of Stuttgart, IQST and SCoPE, Stuttgart, Germany — 2IMS, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany

Stability and scalability of quantum computation and quantum simulation implementations will largely benefit from a platform capable to realize usual tabletop functionalities on a single chip. Although to fulfill this need, only few building blocks are absolutely necessary, demonstrating their successful simultaneous implementation remained elusive for long time. Here we will discuss the realization of a fully on-chip Hanbury-Brown and Twiss experiment, realizing on the same chip a non-classical light source, a basic photonic logic and two single photon detectors [1]. GaAs single-mode waveguides embedding semiconductor quantum dots are used in combination with superconducting material to realize a beamsplitter with two superconducting nanowire detectors at the output ports. To further increase the coupling of the quantum dot photons into the waveguide, the realization of waveguidecoupled Bragg grating cavities will also be discussed [2]. These results open the way to implement complex on-chip quantum photonics.

[1] M. Schwartz, et al., Nano Lett. 18, 6892 (2018).

[2] S. Hepp, et al., Opt. Express 26, 30614 (2018).

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