Acceleration of Metal Nanoparticle with Irradiation Pressure

TL;DR

This paper investigates how irradiation pressure can accelerate spheroidal metal nanoparticles near surface plasmon resonance, highlighting the influence of particle shape and orientation on acceleration.

Contribution

It provides analytical expressions for resonance acceleration components of nonspherical nanoparticles under different light polarizations, emphasizing shape and orientation effects.

Findings

Resonance acceleration depends on nanoparticle shape and orientation.

Analytical formulas for acceleration components under plane and circular polarization.

Shape and orientation significantly influence nanoparticle acceleration near resonance.

Abstract

The acceleration of an spheroidal metal nanoparticle in an irradiation field with a frequency close to the surface plasmon vibration has been considered. Under the action of radiation pressure, the polarizability for nonspherical particle becomes a tensor quantity. The analytical expressions for the resonance acceleration components for the cases of plane-polarized and circularly polarized light have been derived. We have demonstrated that the resonance acceleration can depend substantially on the shape of a metal nanoparticle and its orientation with respect to the directions of light propagation and the light polarization.