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

Abstract

We use polarization resolved micro-photoluminescence to analyze the dipolar nature of single core/shell cadmium selenide/cadmium sulfide (CdSe/CdS) dot-in-rods. Polarization analysis, anisotropy measurements on more than 400 nanoparticles, and defocused imaging suggest that these nanoparticles behave as linear dipoles. The same methods were also used to determine the three-dimensional orientation of the emission dipole, which proved to be consistent with the hypothesis of a linear dipole tilted with respect to the rod axis. Moreover, we observe that for high-energy pumping, the excitation transition of the dot-in-rod cannot be approximated by a single linear dipole, contrary to the emission transition.


Autore Pugliese

Tutti gli autori

  • Lethiec C.; Pisanello F.; Carbone L.; Bramati A.; Coolen L.; Maitre A.

Titolo volume/Rivista

New journal of physics


Anno di pubblicazione

2014

ISSN

1367-2630

ISBN

Non Disponibile


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Nessuna citazione

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Settori ERC

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Codici ASJC

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