Stimulated Brillouin Cavity Optomechanics in Liquid Droplets

Year: 2018

Authors: Giorgini A., Avino S., Malara P., De Natale P., Yannai M., Carmon T., Gagliardi G.

Autors Affiliation: CNR, INO, Via Campi Flegrei,34 Comprensorio A Olivetti, I-80078 Naples, Italy; CNR, INO, Largo E Fermi 6, I-50125 Florence, Italy; Technion Israel Inst Technol, Mech Engn Dept, IL-32000 Haifa, Israel.

Abstract: Liquid droplets are ubiquitous in nature wherein surface tension shapes them into perfect spheres with atomic-scale smooth surfaces. Here, we use stable droplets that cohost equatorial acoustical and optical resonances phase matched to enable the exchange of energy and momentum between sound and light. Relying on free-space laser excitation of multiple whispering-gallery modes, we harness a triple-resonant forward Brillouin scattering to stimulate optomechanical surface waves. Nonlinear amplification of droplet vibrations in the 60-70 MHz range is realized with spectral narrowing beyond the limit of material loss, thereby activating the droplet as hypersound-laser emitter.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 120 (7)      Pages from: 073902-1  to: 073902-5

More Information: This research work was supported by the P. O. R. Campania FESR 2007-2013 project titled \”BERSAGLI.\” The authors are grateful to G. Notariale for his technical assistance.
KeyWords: Brillouin scattering; Forward scattering; Laser excitation; Phase matching; Quantum optics; Surface waves; Whispering gallery modes, Cavity optomechanics; Exchange of energy; Liquid droplets; Nonlinear amplification; Optical resonance; Smooth surface; Spectral narrowing; Stimulated Brillouin, Drops
DOI: 10.1103/PhysRevLett.120.073902

ImpactFactor: 9.227
Citations: 33
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-24
References taken from IsiWeb of Knowledge: (subscribers only)

Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here