Acoustic transport and manipulation of quantum wells excitons
Paulo V. Santos
Paul-Drude-Institut für Festkörperelektronik, Berlin
Tue, Oct. 27th 2015, 15:00-16:00
Bât. K, Salle R. Lemaire (K223), Institut Néel

ATTENTION : en raison de la mise en application avancée du plan vigipirate, toutes les personnes qui ne possèdent pas de badge CNRS doivent nous signaler leur venue au plus tard 24 heures à l'avance, afin d’ajouter leur nom à la liste des personnes autorisées à entrer sur le site.

Excitons mediate the interaction between photons and electronic excitations in a semiconductor: this property makes them good candidates for the storage and processing of photonic information in the solid-state. In this talk, I will introduce a novel concept for information processing based on the transport and manipulation of quantum-well excitons by surface acoustic waves (SAWs) [1]. Experimental data will be presented to demonstrate that spin-polarized excitons can be transported along the quantum well plane over several tens of micrometer. Furthermore, the spin polarization of the moving excitons can be controlled by electrostatic fields [2,3]. The controlled acoustic transport of excitons thus provide an efficient pathway for spin manipulation in semiconducting nanostructures.

Contact : Michel BENINI

 

Retour en haut