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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 22 — Oct. 26, 2009
  • pp: 20465–20475

Electric currents induced by twisted light in Quantum Rings

G. F. Quinteiro and J. Berakdar  »View Author Affiliations

Optics Express, Vol. 17, Issue 22, pp. 20465-20475 (2009)

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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 µA; from an applied perspective, this opens new possibilities to the optical control of the magnetization in semiconductors.

© 2009 Optical Society of America

OCIS Codes
(000.0000) General : General

ToC Category:
Quantum Optics

Original Manuscript: August 28, 2009
Revised Manuscript: September 23, 2009
Manuscript Accepted: September 24, 2009
Published: October 23, 2009

G. F. Quinteiro and J. Berakdar, "Electric currents induced by twisted light in Quantum Rings," Opt. Express 17, 20465-20475 (2009)

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