Temperature insensitive optical alignment of the exciton in nanowire embedded GaN Quantum Dots

Details Temperature insensitive optical alignment of the exciton in nanowire embedded GaN Quantum Dots Temperature insensitive optical alignment of the exciton in nanowire embedded GaN Quantum Dots

2011-07-28

arxiv.org/abs/1107.5644v1

Physics

Condensed Matter

Materials Science

13 pages, 5 figures

Scientific paper

We report on the exciton spin dynamics of nanowire embedded GaN/AlN Quantum Dots (QDs) investigated by time-resolved photoluminescence spectroscopy. Under a linearly polarized quasiresonant excitation we evidence the quenching of the exciton spin relaxation and a temperature insensitive degree of the exciton linear polarization, demonstrating the robustness of the optical alignment of the exciton spin in these nanowire embedded QDs. A detailed examination of the luminescence polarization angular dependence shows orthogonal linear exciton eigenstates with no preferential crystallographic orientation.

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