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arXiv · 1401.1030

Polarimetry-based analysis of dipolar transitions of single colloidal CdSe/CdS dot-in-rods

Clotilde Lethiec·Ferruccio Pisanello·Luigi Carbone·Alberto Bramati·Laurent Coolen·Agnès Maître
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Abstract

We prove experimentally, upon polarization analysis performed on a large statistic of single nanoemitters, that high quality core/shell CdSe/CdS dot-in-rods behave as linear dipoles. Moreover, the dipole in-plane and out-of-plane orientations could be assessed. We demonstrate in particular that, contrary to expectations, the emitting dipole is not aligned with the elongated axis of the dot-in-rod. Besides, the polarimetric measurements prove that the excitation transition cannot be approximated by a single linear dipole, contrary to the emission transition. Finally, we highlight that non-radiative channels of charge carrier recombination do not affect the dipolar nature of the radiative transitions.

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Clotilde Lethiec, Ferruccio Pisanello, Luigi Carbone, Alberto Bramati, Laurent Coolen, Agnès Maître. 2014-01-06. Polarimetry-based analysis of dipolar transitions of single colloidal CdSe/CdS dot-in-rods. https://doi.org/10.1088/1367-2630%2F16%2F9%2F093014

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