2015/08/25 by Raphael Dahan, Dahan, Raphael, Leopoldo L. Martín +4
Agricultural and Biological Sciences · Engineering · Physics and Astronomy · #Aerosol Filtration and Electrostatic Precipitation #Modular Robots and Swarm Intelligence #Plant Surface Properties and Treatments #cond-mat.soft #physics.flu-dyn #physics.gen-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.1508.06628
arxiv created 2015/08/30 · arxiv updated 2015/09/01
Contrary to their capillary resonances (Rayleigh, 1879) and their optical resonances (Ashkin, 1977), droplets acoustical resonances were rarely considered. Here we experimentally excite, for the first time, the acoustical resonances of a droplet that relies on sound instead of capillary waves. Droplets vibrations at 37 MHz rates and 100 quality factor are optically excited and interrogated at an optical threshold of 68 microWatt. Our vibrations span a spectral band that is 1000 times higher when compared with drops previously-studied capillary vibration.