论文标题
浓缩无序共振乳液中的超声波传输
Ultrasonic wave transport in concentrated disordered resonant emulsions
论文作者
论文摘要
我们展示了通过浓缩悬浮液的超声波实验在无序培养基中的波传输（近场）耦合。样品由谐振乳液组成，其中油滴悬浮在液体凝胶中。通过改变液滴浓度，可以在实验中证明独立散射近似的极限。对于最集中的样品，谐振散射器的接近性诱导周围介质的重新归一化，从而导致散射强度的降低。我们指出，在实验中证明了非排水波传输的油滴的最佳体积分数。我们在中间液滴浓度下最大散射的证明与设计材料的研究非常相关，以研究安德森定位等波传输现象。
We show how resonant (near-field) coupling affects wave transport in disordered media through ultrasonic experiments in concentrated suspensions. The samples consist of resonant emulsions in which oil droplets are suspended in a liquid gel. By varying the droplet concentration, the limits of the Independent Scattering Approximation are experimentally demonstrated. For the most concentrated samples, the proximity of resonant scatterers induces a renormalization of the surrounding medium, leading to a reducing of scattering strength. We point out an optimal volume fraction of oil droplets for which non-diffusive wave transport is experimentally demonstrated. Our demonstration of maximum scattering at an intermediate droplet concentration is very relevant for designing materials for the study of wave transport phenomena such as Anderson Localization.
