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Physics Research International
Volume 2011 (2011), Article ID 505091, 5 pages
http://dx.doi.org/10.1155/2011/505091
Research Article

Spin Polarized Transport in an AC-Driven Quantum Curved Nanowire

1Faculty of Engineering, Ain-Shams University, Cairo 11517, Egypt
2Higher Technological Institute, Ramadan Tenth City 44629, Egypt

Received 17 September 2010; Accepted 20 April 2011

Academic Editor: Neil Sullivan

Copyright © 2011 Walid A. Zein et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Using the effective-mass approximation method, and Floquet theory, we study the spin transport characteristics through a curved quantum nanowire. The spin polarization, 𝑃 , and the tunneling magnetoresistance, TMR, are deduced under the effect of microwave and infrared radiations of wide range of frequencies. The results show an oscillatory behavior of both the spin polarization and the tunneling magnetoresistance. This is due to Fano-type resonance and the interplay between the strength of spin-orbit coupling and the photons in the subbands of the one-dimensional nanowire. The present results show that this investigation is very important, and the present device might be used to be a sensor for small strain in semiconductor nanostructures and photodetector.