Artículos de revistas
Electric currents induced by twisted light in quantum rings
Fecha
2009-10Registro en:
Quinteiro, Guillermo Federico; Berakdar, J.; Electric currents induced by twisted light in quantum rings; Optical Society of America; Optics Express; 17; 22; 10-2009; 20465-20475
1094-4087
CONICET Digital
CONICET
Autor
Quinteiro, Guillermo Federico
Berakdar, J.
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 juA; from an applied perspective, this opens new possibilities to the optical control of the magnetization in semiconductors. © 2009 Optical Society of America.