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Exciton lifetime in InAs/GaAs quantum dot molecules

Autor: Bardot, C., Schwab, M., Bayer, M., Fafard, S., Wasilewski, Z., Hawrylak, P.

The exciton lifetimes $T_1$ in arrays of InAs/GaAs vertically coupled quantum dot pairs have been measured by time-resolved photoluminescence. A considerable reduction of $T_1$ by up to a factor of $\sim$ 2 has been observed as compared to a quantum

Externí odkaz: http://arxiv.org/abs/cond-mat/0504510

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Non-linear exciton spin-splitting in single InAs/GaAs self-assembled quantum structures in ultrahigh magnetic fields

Autor: Babinski, A., Ortner, G., Raymond, S., Potemski, M., Bayer, M., Hawrylak, P., Forchel, A., Wasilewski, Z., Fafard, S.

We report on the magnetic field dispersion of the exciton spin-splitting and diamagnetic shift in single InAs/GaAs quantum dots (QDs) and dot molecules (QDMs) up to $B$ = 28 T. Only for systems with strong geometric confinement, the dispersions can b

Externí odkaz: http://arxiv.org/abs/cond-mat/0503271

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Autor: Ulrich, S. M., Benyoucef, M., Michler, P., Baer, N., Gartner, P., Jahnke, F., Schwab, M., Kurtze, H., Bayer, M., Fafard, S., Wasilewski, Z.

The optical creation and recombination of charged biexciton and trion complexes in an (In,Ga)As/GaAs quantum dot is investigated by micro-photoluminescence spectroscopy. Photon cross-correlation measurements demonstrate the temporally correlated deca

Externí odkaz: http://arxiv.org/abs/cond-mat/0407441

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Anomalous magnetophotoluminescence as a result of level repulsion in arrays of quantum dots

Autor: Tsiper, E. V., Wang, P. D., Merz, J. L., Efros, A. L., Fafard, S., Leonard, D., Petroff, P. M.

Selectively excited photoluminescence (SPL) of an array of self-organized In$_{0.5}$Ga$_{0.5}$As quantum dots has been measured in a magnetic field up to 11T. Anomalous magnetic field sensitivity of the SPL spectra has been observed under conditions

Externí odkaz: http://arxiv.org/abs/cond-mat/9702170

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