Berlin 2018 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 4: Quantum dots and wires: Optical properties I
HL 4.9: Talk
Monday, March 12, 2018, 11:45–12:00, EW 201
Fully On-Chip Hanbury-Brown and Twiss Experiment with Semiconductor Quantum Dots — •Florian Hornung1, Mario Schwartz1, Ekkehart Schmidt2, Stefan Hepp1, Ulrich Rengstl1, Simone Luca Portalupi1, Michael Jetter1, Konstantin Ilin2, Michael Siegel2, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Research Center SCoPE and IQST, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany — 2Institute of Micro- and Nanoelectronic Systems (IMS), Karlsruhe Institute of Technology (KIT), Hertzstrasse 16, 76131 Karlsruhe, Germany
The generation, manipulation and detection of single photons on-chip is currently under strong investigation due to their large potential in quantum information processing. Up to now, experiments using laser excitation of quantum dots and on-chip detectors suffer from a high laser background on the detectors, which makes a temporal filtering of the detected signal necessary. [1]
Here, we present a fully integrated circuit, consisting of an InGaAs/GaAs quantum dot which is resonantly pumped, two single mode GaAs/AlGaAs waveguides forming a 50/50 beamsplitter structure and two NbN superconducting nanowire single photon detectors. With this system we perform on-chip second order correlation measurements on a single photon level without temporal filtering.
[1] G. Reithmaier et al. Nano Lett., 2015, 15 (8), pp 5208-5213.