Minimum Line Width of Surface Plasmon Resonance in Doped ZnO Nanocrystals

Delerue, Christophe

Type de document :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1021/acs.nanolett.7b03605

Titre :

Minimum Line Width of Surface Plasmon Resonance in Doped ZnO Nanocrystals

Auteur(s) :

Delerue, Christophe [Auteur]

Physique - IEMN [PHYSIQUE - IEMN]
Physique - IEMN [PHYSIQUE - IEMN]

Titre de la revue :

Nano Letters

Pagination :

7599-7605

Éditeur :

American Chemical Society

Date de publication :

2017

ISSN :

1530-6984

Discipline(s) HAL :

Physique [physics]/Matière Condensée [cond-mat]/Autre [cond-mat.other]

Résumé en anglais : [en]

The optical response of ZnO nanocrystals (NCs) doped with Al (Ga) impurities is calculated using a model that incorporates the effects of quantum confinement, dielectric mismatch, surface, and ionized impurity scattering. ...
Lire la suite >The optical response of ZnO nanocrystals (NCs) doped with Al (Ga) impurities is calculated using a model that incorporates the effects of quantum confinement, dielectric mismatch, surface, and ionized impurity scattering. For dopant concentrations of a few percent, the NC polarizability is dominated by a localized surface plasmon resonance (LSPR) in the infrared (IR) which follows the Drude-Lorentz law for NC diameter above ∼10 nm but is strongly blue-shifted for smaller diameters due to quantum confinement effects. The intrinsic width of the LSPR peak is calculated in order to characterize plasmon losses induced by ionized impurity scattering. Widths below 80 meV are found in the best cases, in agreement with the lowest values recently measured on single NCs. These results confirm that doped ZnO NCs are very promising for the development of IR plasmonics. The width of the LSPR peak strongly increases when dopants are placed near the surface of the NCs or when additional fixed charges are present.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Projet ANR :

Nanostructures de ZnO dopées Ga pour la plasmonique IR accordable

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