Collective excitations in charged nanocrystals
Document type :
Autre communication scientifique (congrès sans actes - poster - séminaire...): Communication dans un congrès avec actes
Title :
Collective excitations in charged nanocrystals
Author(s) :
Delerue, Christophe [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Niquet, Yann-Michel [Auteur]
Département de Recherche Fondamentale sur la Matière Condensée [DRFMC]
Allan, Guy [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Niquet, Yann-Michel [Auteur]
Département de Recherche Fondamentale sur la Matière Condensée [DRFMC]
Allan, Guy [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Conference title :
Materials Research Society 2005 Fall Meeting
City :
Boston, MA
Country :
Etats-Unis d'Amérique
Start date of the conference :
2005-11-28
Publication date :
2005
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
We present self-consistent tight binding calculations of the dielectric response of charged semiconductor nanocrystals. We predict collective effects such as the oscillation in opposite phase of the additional electron and ...
Show more >We present self-consistent tight binding calculations of the dielectric response of charged semiconductor nanocrystals. We predict collective effects such as the oscillation in opposite phase of the additional electron and of the plasma of valence electrons near the resonance. In arrays of charged nanocrystals, the coupling between infrared light and collective excitations is shown to be strong, the real part of the dielectric constant becoming negative in some part of the spectrum. Transverse and longitudinal excitation modes obeying the Lyddane-Sachs-Teller equation are predictedShow less >
Show more >We present self-consistent tight binding calculations of the dielectric response of charged semiconductor nanocrystals. We predict collective effects such as the oscillation in opposite phase of the additional electron and of the plasma of valence electrons near the resonance. In arrays of charged nanocrystals, the coupling between infrared light and collective excitations is shown to be strong, the real part of the dielectric constant becoming negative in some part of the spectrum. Transverse and longitudinal excitation modes obeying the Lyddane-Sachs-Teller equation are predictedShow less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Non spécifiée
Popular science :
Non
Source :