|Univ Alexandria, Fac Sci, Dept Phys, Alexandria 21511, Egypt.|
|[ 1 ] Univ Alexandria, Fac Sci, Dept Phys, Alexandria 21511, Egypt|
Published: NOV 1 2016
We have calculated the effect of an external electric field on the intersubband optical absorption of a nanowire subjected to a perpendicular magnetic field and Rashba effect. The absorption peaks due to optical transitions that are forbidden in the absence of the intersubband coupling experience strong amplitude modulation. This effect is quadratic in electric fields applied along the direction of quantum confinement or perpendicularly to tune the Rashba parameter. The electric field also induces frequency modulation in the associated spectrum. On the other hand, transitions that are normally allowed show, to a large extent, a parallel band effect, and accordingly they are responsible for strong optical absorption. (C) 2016 Elsevier B.V. All rights reserved.