Tallon Benoit, Brunet Thomas, Page John H
I2M, Université de Bordeaux-CNRS-Bordeaux INP, Talence F-33405, France.
Department of Physics, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2.
Phys Rev Lett. 2017 Oct 20;119(16):164301. doi: 10.1103/PhysRevLett.119.164301. Epub 2017 Oct 19.
The strong impact of scattering resonances on all the key transport parameters of classical waves in disordered media is demonstrated through ultrasonic experiments on monodisperse emulsions. Through accurate measurements of both ballistic and diffusive transport over a wide range of frequencies, we show that the group velocity is large near sharp resonances, whereas the energy velocity (as well as the diffusion coefficient) is significantly slowed down by resonant scattering delay. Excellent agreement between theory and experiment is found, elucidating the effects of resonant scattering on wave transport in both acoustics and optics.
