Self-assembled quantum dots: single photons, single spins

Date

Jun 20, 2014

Time

1:00 PM - 2:00 PM

Speaker

Prof. Dr. Richard J. Warburton

Affiliation

University of Basel

Language

en

Main Topic

Materialien

Other Topics

Materialien

Host

Ulrike Steere

Description

A single self-assembled quantum dot is a potentially excellent source of single photons and in addition, host for a spin qubit. Performance is limited by noise. Experiments will be presented in the ideal limit (high quality material at low temperature with resonant optical excitation) which demonstrate the important role of noise in the nuclear spins for both single photon generation and electron spin dephasing. Routes to circumvent this noise will be presented culminating in a close-to-transform limited source of single photons and a spin qubit with a dephasing time of hundreds of nano-seconds. These experiments also facilitate a detailed investigation of the nuclear spins themselves. Some remaining conundrums will be presented, as will attempts to boost the optical signals with a high quality micro-cavity and to shift the wavelength to 780 nm for a hybrid artificial atom-real atom quantum hybrid.

Links

• Seminars at the IFW

Last modified: Jun 20, 2014, 9:38:19 AM