Effects of imperfect angular adjustment on plasmonic force

TL;DR

This paper investigates how slight misalignments of metallic plates and laser beams affect the plasmonic force in narrow slits, revealing that small angular deviations can significantly alter the force magnitude and mode behavior.

Contribution

It provides a detailed analysis of the first- and second-order effects of imperfect angular adjustments on plasmonic forces between metallic plates.

Findings

Force decreases with small incidence angles due to antisymmetric modes.

First-order change in force for plates inclined along wave propagation.

Second-order change in force for transverse inclination.

Abstract

The attractive plasmon force between two metallic walls when the electromagnetic wave propagates through a narrow slit has been studied earlier for parallel plates and normal incidence. In present paper the effects of imperfect adjustment of plates and laser beam are analyzed. The change of force for non-parallel plates is shown to be of the first order in inclination angle when the wedge is along wave propagation and of the second order for transverse case. The small incidence angle leads to decrease in force due to the antisymmetric waveguide mode appearing in the slit.