Affiliation:
1. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
2. Universidad Austral
3. University of Valencia
Abstract
The ability to control optomechanical interactions at subwavelength
levels is of key relevance in modern optics. The present work focuses
on the improvement of the force exerted on a dielectric nanoparticle
placed near an attenuated total reflection structure containing
graphene. Our results show that this force is highly dependent on the
angle of incidence of the impinging plane wave, and it can be enhanced
by nearly three orders of magnitude when this angle coincides with
that of the critical total internal reflection and that corresponding
to the excitation of surface plasmons along the graphene layer. New
effects are found in these angular regions where the induced
elliptical polarizability on the nanoparticle provides an asymmetric
excitation of electromagnetic modes that generates a pulling
(attractive) component whose magnitude is comparable to that of the
pushing (repulsive) force provided by the incident field. As a
consequence and contrary to what happens for large separation
distances, an asymmetric response with respect to the angle of
incidence arises for short distances for which the force on the
particle is described by curves having a maximum and a minimum. Our
results can contribute to a better understanding of polarization
dependent interactions between nanoparticles and electromagnetic mode
fields for taking advantage of them in nanoparticle manipulation
applications.
Funder
Agencia Nacional de Promoción de la
Investigación, el Desarrollo Tecnológico y la
Innovación
Universidad Austral
Consejo Nacional de Investigaciones
Científicas y Técnicas
Subject
Atomic and Molecular Physics, and Optics,Statistical and Nonlinear Physics
Cited by
1 articles.
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