| Program |
II-VI semiconductor quantum dots with high confinement potentials and large Coulomb correlation energies provide promising systems for quantum optical experiments. In my talk, I will report on two-color femtosecond pump-probe measurements on a single self-assembled CdSe/ZnSe quantum dot. Recent developmentsin thesample design enable us to resonantly excite and spectro-temporally investigatesimultaneouslythe trion line and the biexcitonic emission lines of a singly charged quantum dot. After hot exciton creation by the pump, for positive time delays the trion resonance exhibits an initial bleaching followed by stimulated emission, which occurs after relaxation to the ground state [1]. Additionally, negative pump-probe features emerge on the low-energy side of the trion line. We attribute those to an induced absorption into the biexcitonic states [2]. This picture is corroborated by matching transient absorption and photoluminescence emission lines. [1] F. Sotier, T. Thomay, T. Hanke, J. Korger, S. Mahapatra, A. Frey, K. Brunner, R. Bratschitsch, and A. Leitenstorfer, Femtosecond fewfermion dynamics and deterministic single-photon gain in a quantum dot, Nature Phys. 5, 352-356 (2009). [2] J. Huneke, I. D'Amico, P. Machnikowski, T. Thomay, R. Bratschitsch, A. Leitenstorfer, and T. Kuhn, Role of Coulomb correlations for femtosecond pump-probe signals obtained from a single quantum dot, Phys. Rev. B 84,115320(2011). |
Ursula Keller wins “Swiss Nobel” Marcel Benoist Prize
Farewell: the NCCR MUST ended 
MUST2022 Conference
New scientific highlights
FELs of Europe prize for Jeremy Rouxel
Ruth Signorell wins Doron prize
New FAST-Fellow Uwe Thumm at ETH
International Day of Women and Girls in Science
New scientific highlight
EU XFEL Young Scientist Award for Camila Bacellar,
Prizes for Giulia Mancini and Rebeca Gomez Castillo
Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List
Hans Jakob Wörner invited to give the „New Horizons Solvay Lectures” 
Unusual keynote talk at an international scientific conference
NCCR MUST at Scientifica 2021
