Two-Photon Coherent Spin Flip and Polarization Rotation of Excitons in Quantum Dots

Original Paper


It is shown that the spin orientation and polarization of an exciton confined in a QD can be controlled via two-photon transitions, by virtually coupling the single-exciton states to the detuned ground and biexciton states. Furthermore, phonon-induced dephasing leading to loss of fidelity in the two-photon optical control schemes is studied. Exciton spin flip can be performed with errors as low as 10−3.


Quantum dot Spin Decoherence Coherent control 


  1. 1.
    Berezovsky, J., Mikkelsen, M.H., Stoltz, N.G., Coldren, L.A., Awschalom, D.D.: Science 320, 349 (2008) CrossRefADSGoogle Scholar
  2. 2.
    Machnikowski, P., Grodecka, A., Weber, C., Knorr, A.: Mater. Sci. (Poland) 26, 851 (2008). arXiv:0706.0276v1 [cond-mat.mes-hall] Google Scholar
  3. 3.
    Bayer, M., Ortner, G., Stern, O., Kuther, A., Gorbunov, A.A., Forchel, A., Hawrylak, P., Fafard, S., Hinzer, K., Reinecke, T.L., Walck, S.N., Reithmaier, J.P., Klopf, F., Schäfer, F.: Phys. Rev. B 65, 195315 (2002) CrossRefADSGoogle Scholar
  4. 4.
    Stufler, S., Machnikowski, P., Ester, P., Bichler, M., Axt, V.M., Kuhn, T., Zrenner, A.: Phys. Rev. B 73, 125304 (2006) CrossRefADSGoogle Scholar
  5. 5.
    Machnikowski, P.: Acta Phys. Pol. A 112, 289 (2007). arXiv:0706.0858 [cond-mat.mes-hall] ADSGoogle Scholar
  6. 6.
    Machnikowski, P.: Phys. Status Solidi 5, 2486 (2008) CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Institute of PhysicsWrocław University of TechnologyWrocławPoland

Personalised recommendations