Field tunable plasmonic lenses for optical microscopy

TL;DR

This paper investigates how to control and tune plasmonic lenses made from nanoslit arrays to improve high-resolution optical microscopy, using simulations to analyze their behavior and focal properties.

Contribution

It introduces a method to tune plasmonic lens confinement by adjusting slit design, refractive index, and angular distribution, supported by simulation results.

Findings

Confinement can be regulated by slit design, refractive index, and angular distribution.

Simulations show adjustable focal shifts and power flow in plasmonic lenses.

Tunable plasmonic lenses enhance sub-wavelength optical microscopy capabilities.

Abstract

This study examines the behavior and tunability of plasmonic lenses created from arrays of nanoslits, applicable in sub-wavelength optical microscopy and other high-resolution imaging systems. We performed simulations on COMSOL Multiphysics to assess power flow and focal shifts in plasmonic lenses with differing slit designs, refractive indices, and angular distributions. The findings indicate that the confinement can be regulated by adjusting these parameters.