Resonant interaction between a quantum dot and a narrowband laser: spectroscopy and optical pumping of a single spin

Martin Kroner, Stefan Seidl, Brian D Gerardot, B. Biedermann, A. Badolato, P M Petroff, K Karrai, Richard Warburton

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Abstract

Recently, a technique has been developed for performing laser spectroscopy on single self-assembled quantum dots. A summary is presented here of spectroscopy results concerning the charge- and magnetic-field dependent energies and selection rules of the fundamental exciton. In addition, it is also shown how the resonant interaction of a laser with a singly-charged dot can be exploited to pump the electron into one of the spin states. This involves applying a small magnetic field and an appropriate bias in order to suppress spin relaxation through the hyperfine interaction and through co-tunneling processes, respectively.

Original languageEnglish
Pages (from-to)1307-1315
Number of pages9
JournalInternational Journal of Modern Physics B
Volume21
Issue number8-9
DOIs
Publication statusPublished - 10 Apr 2007

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