Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2004 Apr 16;92(15):157401.
doi: 10.1103/PhysRevLett.92.157401. Epub 2004 Apr 16.

Optical Stark effect in a quantum dot: ultrafast control of single exciton polarizations

Thomas Unold  1 , Kerstin Mueller, Christoph Lienau, Thomas Elsaesser, Andreas D Wieck
Affiliations

Optical Stark effect in a quantum dot: ultrafast control of single exciton polarizations

Thomas Unold et al. Phys Rev Lett. .

Abstract

We report the first experimental study of the optical Stark effect in single semiconductor quantum dots (QD). For below band gap excitation, two-color pump-probe spectra show dispersive line shapes caused by a light-induced blueshift of the excitonic resonance. The line shape depends strongly on the excitation field strength and is determined by the pump-induced phase shift of the coherent QD polarization. Transient spectral oscillations can be understood as rotations of the QD polarization phase with negligible population change. Ultrafast control of the QD polarization is demonstrated.

PubMed Disclaimer