IFIBA   22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Electronic transitions in quantum dots and rings induced by inhomogeneous off-centered light beams
Autor/es:
G. F. QUINTEIRO; A. O. LUCERO; P. I. TAMBORENEA
Revista:
JOURNAL OF PHYSICS CONDENSED MATTER
Editorial:
IOP PUBLISHING LTD
Referencias:
Año: 2010 vol. 22 p. 505802 - 505807
ISSN:
0953-8984
Resumen:
We theoretically investigate the effect of inhomogeneous light beams
with (twisted light) and without (plane-wave light) orbital angular
momentum on semiconductor-based nanostructures, when the symmetry axes
of the beam and the nanostructure are displaced parallel to each other.
Exact analytical results are obtained by expanding the off-centered
light field in terms of the appropriate light modes centered around the
nanostructure. We demonstrate how electronic transitions involving the
transfer of different amounts of orbital angular momentum are switched
on and off as a function of the separation between the axes of the beam
and the system. In particular, we show that even off-centered plane-wave
beams induce transitions such that the angular momenta of the initial
and final states are different.