Coherent control of the biexciton in a single quantum dot

✍ Scribed by Flissikowski, T. ;Betke, A. ;Akimov, I. A. ;Henneberger, F.

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 150 KB
• Volume: 202
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200460323

✦ Synopsis

Abstract

We report on coherent control of the two‐photon transition between the ground state and the biexciton state on a single quantum dot level. The population of the biexciton is monitored by the cascaded spontaneous emission of the biexciton complex via the exciton states. The signal shows interference pattern at the double laser frequency and its contrast decays non‐exponentially at the time scale of 10 ps. The contrast decrease is attributed to a dynamical inhomogeneous broadening of the energy levels due to long‐term fluctuations in the dot environment. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)