Scientific Results

Light pressure in droplet micro-resonators excited by free-space scattering

Year: 2021

Authors: Gagliardi G., D’Ambrosio D., Capezzuto M., Giorgini A., Avino S., Malara P., De Natale P.

Autors Affiliation: CNR-INO

Abstract: A droplet optical resonator is a unique environment toinvestigate light–matter interaction and optomechanicsin liquids. Here, we report on light pressure effects derivedfrom whispering gallery modes excited in a liquid-polymerdroplet micro-resonator by free-space laser scattering. Fromthe nonlinear resonance spectrum observed in the visible, weprovide evidence of photon pressure exerted at the liquid-airboundary and quantify it with a coherent physical model.Our findings pave the way to studies on micro-rheology andnonlinear optofluidics, where droplets serve as miniatureliquid laboratories.© 2021

Journal/Review: OPTICS LETTERS

Volume: 46      Pages from: 3111  to: 3114

KeyWords: droplet microresonators, whispering gallery mode, radiation pressure, cavity optomechanics
DOI: 10.1364/OL.427260

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