Demonstration of whispering-gallery-mode resonant enhancement of optical forces

TL;DR

This paper demonstrates how whispering-gallery modes can resonantly enhance optical forces on dielectric microspheres, enabling precise optical sorting based on resonant properties, which surpasses traditional methods.

Contribution

The study experimentally shows resonance-enhanced optical forces using WGMs, enabling highly selective optical sorting of microparticles based on their resonant characteristics.

Findings

Resonant light pressure can be used for optical sorting of microparticles.

Whispering-gallery modes significantly enhance optical forces on dielectric microspheres.

The method achieves uniformity in resonant properties for particle sorting.

Abstract

We experimentally studied whispering-gallery modes(WGMs) and demonstrated resonance enhancement of optical forces evanescently exerted on dielectric microspheres. We showed that the resonant light pressure can be used for optical sorting of microparticles with extraordinary uniform resonant properties that is unachievable by conventional sorting techniques.