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Title: Alignment of rod-shaped single-photon emitters driven by line defects in liquid crystals
Authors: Pelliser, Laurent
Manceau, Mathieu
Lethiec, Clotilde
Coursault, Delphine
Vezzoli, Stefano
Leménager, Godefroy
Coolen, Laurent
DeVittorio, Massimo
Pisanello, Ferruccio
Carbone, Luigi
Maitre, Agnes
Bramati, Alberto
Lacaze, Emmanuelle
Keywords: DRNTU::Engineering::Materials::Functional materials
Issue Date: 2015
Source: Pelliser, L., Manceau, M., Lethiec, C., Coursault, D., Vezzoli, S., Leménager, et al. (2015). Alignment of rod-shaped single-photon emitters driven by line defects in liquid crystals. Advanced functional materials, 25(11), 1719-1726.
Series/Report no.: Advanced functional materials
Abstract: Arrays of liquid crystal defects—linear smectic dislocations—are used to trap semiconductor CdSe/CdS dot-in-rods which behave as single-photon emitters. Measurements of the emission diagram are combined together with measurements of the emitted polarization of the single emitters. It is shown that the dot-in-rods are confined parallel to the linear defects to allow for a minimization of the disorder energy associated with the dislocation cores. It is demonstrated that the electric dipoles associated with the dot-in-rods, tilted with respect to the rods, remain oriented in the plane including the smectic linear defects and perpendicular to the substrate, most likely due to dipole/dipole interactions between the dipoles of the liquid crystal molecules and those of the dot-in-rods. Using smectic dislocations, nanorods can consequently be oriented along a unique direction for a given substrate, independently of the ligands' nature, without any induced aggregation, leading as well to a fixed azimuthal orientation for the dot-in-rods' dipoles. These results open the way for the fine control of nanoparticle anisotropic optical properties, in particular, fine control of single-photon emission polarization.
ISSN: 1616-301X
DOI: 10.1002/adfm.201403331
Rights: © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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