Quantum optics with semiconductor quantum dots (Prof. P. Senellart-Mardon)
- Date: Mar 17, 2017
- Time: 01:30 PM - 02:30 PM (Local Time Germany)
- Speaker: Prof. Dr. Pascale Senellart-Mardon
- Center for Nanoscience and Nanotechnology - Marcoussis Campus, CNRS / Paris Sud Université
- Room: Herbert Walther Lecture Hall
- Host: MPQ, Quantum Dynamics Division
Deterministic sources and gates can in principle be obtained making use of the single-photon sensitivity of an atomic transition. In this context, artificial atoms in the form of semiconductor quantum dots have emerged as a promising system to boost optical quantum technologies, offering the potential of integration and scalability.
In this talk, I will review the recent
contributions of our group to this research field. I will discuss how a single
quantum dot can be positioned in an optical cavity in a fully controlled way,
so as to control its spontaneous emission on demand. Close to ideal atom-photon
interfaces are obtained, where a single quantum dot interacts with a single
mode of the optical field and is largely isolated from all sources of
decoherence. These technological developments have allowed the fabrication of bright
solid-state sources of single-photon with single photon purity and indistinguishability
exceeding 99%. The brightness of the sources exceeds by a factor 20 the one of currently
used sources. We have also made progresses toward the development of
deterministic two-photon gates, with devices performing as nonlinear switches
at the single-photon level, converting a coherent pulse into a highly
non-classical light wave-packet.