Generation of two-dimensional plasmonic bottle beams

TL;DR

This paper introduces a novel two-dimensional plasmonic bottle beam created by interference of specific surface waves, enabling engineered hot spot lattices for potential applications in plasmonic trapping.

Contribution

It presents the design and creation of a 2D plasmonic bottle beam using interference of a cosine-Gaussian beam and a plane wave, allowing control over hot spot size and number.

Findings

Lattice of plasmonic hot spots can be engineered.

The beam is non-diffracting and controllable.

Potential applications in plasmonic trapping.

Abstract

By analogy to the three dimensional optical bottle beam, we introduce the plasmonic bottle beam: a two dimensional surface wave which features a lattice of plasmonic bottles, i.e. alternating regions of bright focii surrounded by low intensities. The two-dimensional bottle beam is created by the interference of a non-diffracting beam, a cosine-Gaussian beam, and a plane wave, thus giving rise to a non-diffracting complex intensity distribution. By controlling the propagation constant of the cosine-Gauss beam, the size and number of plasmonic bottles can be engineered. The two dimensional lattice of hot spots formed by this new plasmonic wave could have applications in plasmonic trapping.