13 Jun
13. Juni 2018

The spin-photon interface

Creating an interface between single spins in a solid-state device and single photons is very appealing as nanotechnology can potentially add a lot of device functionality. However, a solid-state environment is a source of noise. Reported here is progress on two prominent solid-state emitters, a semiconductor quantum dot and the NV colour centre in diamond. The two emitters have complementary strengths and weaknesses. A semiconductor quantum dot is a source of high quality single photons but single spins dephase rapidly. Conversely, the NV centre possesses a highly coherent spin but the photons are of low quality. What can be done? In the case of quantum dots, a hole spin is presented as a way of decoupling the spin from the main source of noise (the nuclear spins of the host material). For NV centres, a micro-cavity potentially solves all the problems related to the optical emission. A means to secure these benefits in practice will be presented.

This work was performed as a collaboration with the groups of Daniel Loss, Patrick Maletinsky and Martino Poggio in Basel and Arne Ludwig and Andreas Wieck at Ruhr-University, Bochum.


Prof. Dr. Richard J. Warburton
Department of Physics, University of Basel, Switzerland


Institut für Festkörperphysik,
Abt. Nanotechnologie


13. Juni 2018
13:30 Uhr


Raum: R001
Schneiderberg 39
30167 Hannover