TY - JOUR
T1 - Stimulated Brillouin Cavity Optomechanics in Liquid Droplets
AU - Giorgini, A.
AU - Avino, S.
AU - Malara, P.
AU - De Natale, P.
AU - Yannai, M.
AU - Carmon, T.
AU - Gagliardi, G.
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/2/15
Y1 - 2018/2/15
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85042154968&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.120.073902
DO - 10.1103/PhysRevLett.120.073902
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C2 - 29542986
AN - SCOPUS:85042154968
SN - 0031-9007
VL - 120
JO - Physical Review Letters
JF - Physical Review Letters
IS - 7
M1 - 073902
ER -