1 March 2010 Ultrafast dynamics and optical spin-control in single magnetic quantum dots
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Abstract
An all-optical magnetization switching protocol is presented where the magnetization associated with a single Mn atom embedded in a single CdTe quantum dot is controlled on a picosecond time scale. Even though there is no direct optical coupling to the Mn spin, the control may be achieved by the optical excitation and manipulation of spin-polarized carriers that couple to the Mn spin via the exchange interaction. It is shown that the Mn spin can be selectively driven into each of its spin eigenstates. By suitably chosen pulse sequences also well defined superposition states can be prepared. The Mn spin dynamics is directly reflected in pump probe type signals.
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Vollrath Martin Axt, Doris E. Reiter, Tilmann Kuhn, "Ultrafast dynamics and optical spin-control in single magnetic quantum dots", Proc. SPIE 7600, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIV, 76000R (1 March 2010); doi: 10.1117/12.840032; https://doi.org/10.1117/12.840032
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