Dichroic reflection of InAs/GaAs quantum dots

E.W. Bogaart, J.E.M. Haverkort, T.J. Eijkemans, T. Mano, R. Nötzel, J.H. Wolter

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Samenvatting

Polarization-resolved reflection measurements are performed on nearly circular InAs/GaAs quantum dots (QDs) by means of time-resolved differential reflection spectroscopy. We observe linear polarization anisotropy of the differential absorption, revealing the dichroic character of the QD reflection. The observed magnitude of the dichroism is Theta[110]/Theta[110]=1.07. The polarization has a preferential direction orientated along the [110] crystal axis, which is confirmed by polarization-resolved photoluminescence. We observe that the polarization anisotropy of the reflectivity is strongly dependent on the pump excitation density, decreasing from Rho=0.14 at low excitation to Rho=0.06 at high excitation. The pump power dependence is described by a binomial model taking into account the statistics of carrier capture into a limited number of QDs.
Originele taal-2Engels
Artikelnummer073519
Pagina's (van-tot)073519-1/5
TijdschriftJournal of Applied Physics
Volume98
Nummer van het tijdschrift7
DOI's
StatusGepubliceerd - 2005

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  • Citeer dit

    Bogaart, E. W., Haverkort, J. E. M., Eijkemans, T. J., Mano, T., Nötzel, R., & Wolter, J. H. (2005). Dichroic reflection of InAs/GaAs quantum dots. Journal of Applied Physics, 98(7), 073519-1/5. [073519]. https://doi.org/10.1063/1.2073971