Year: 2008
Type: article
Abstract: The spin of an electron in a self-assembled InAs/GaAs quantum dot molecule is optically prepared and measured through the trion triplet states. A longitudinal magnetic field is used to tune two of the trion states into resonance, forming a superposition state through asymmetric spin exchange. As a result, spin-flip Raman transitions can be used for optical spin initialization, while separate trion states enable cycling transitions for nondestructive measurement. With two-laser transmission spectroscopy we demonstrate both operations simultaneously, something not previously accomplished in a single quantum dot.
Source: Physical Review Letters
Authors: Danny Kim, Sophia Economou, Ştefan Bădescu, Michael Scheibner, Allan Bracker, Mark Bashkansky, Thomas Reinecke, Daniel Gammon
Institution: United States Naval Research Laboratory
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2376542888