Erlangen 2018 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 51: Poster: Quantum Optics and Photonics IV
Q 51.41: Poster
Wednesday, March 7, 2018, 16:15–18:15, Redoutensaal
Spin-photon interface controlled switching in a nanobeam waveguide — •Tim Schröder1, Alisa Javadi1, Dapeng Ding1, Martin Hayhurst Appel1, Sahand Mahmoodian1, Matthias C. Löbl2, Immo Söllner2, Rüdiger Schott2, Camille Papon1, Tommaso Pregnolato1, Søren Stobbe1, Leonardo Midolo1, Andreas D. Wieck3, Arne Ludwig3, Richard J. Warburton2, and Peter Lodahl1 — 1Niels Bohr Institute, University of Copenhagen, Denmark — 2Department of Physics, University of Basel, Switzerland — 3Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, Germany
Coherent control of two-level quantum systems, for example, the electron spin of a solid-state emitter, is an integral requirement for the implementation of quantum information processing. Towards building quantum gates and creating spin-photon entanglement via spin-photon interfaces in photonic integrated circuits (PIC), we demonstrate an efficient, and optically controllable interface between an electron spin in a InGaAs quantum dot and photons guided in a PIC. The spin-state preparation fidelity reaches 96% and allows for the realisation of a proof-of-concept single spin controlled photon switch with a 4-fold switching ratio between ON and OFF states. The spin state lifetime T1 times reaches 5 µs.
[1] A. Javadi, D. Ding, M. H. Appel, S. Mahmoodian, M. C. Löbl, I. Söllner, R. Schott, C. Papon, T. Pregnolato, S. Stobbe, L. Midolo, T. Schröder, A. D. Wieck, A. Ludwig, R. J. Warburton, and P. Lodahl, arXiv:1709.06369 (2017).