IFIBA 22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Electric currents induced by twisted light in quantum rings
Autor/es:
G. F. QUINTEIRO; JAMAL BERAKDAR
Revista:
OPTICS EXPRESS
Editorial:
OPTICAL SOC AMER
Referencias:
Año: 2009 p. 20465 - 20475
ISSN:
1094-4087
Resumen:
We theoretically investigate the generation of
electric currents in quantum rings resulting
from the optical excitation with twisted light. Our model describes the
kinetics of
electrons in a two-band model of a semiconductor-based mesoscopic
quantum ring coupled to
light having orbital angular momentum (twisted light). We find the
analytical solution,
which exhibits a "circular" photon-drag effect and an induced
magnetization, suggesting
that this system is the circular analog of that of a bulk semiconductor
excited by plane
waves. For realistic values of the electric field and material
parameters, the computed
electric current can be as large as ?A; from an applied perspective,
this opens new
possibilities to the optical control of the magnetization in
semiconductors.
