Wave-based liquid-interface metamaterials

N Francois, H Xia, H Punzmann, P W Fontana and M Shats ()
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N Francois: Centre for Plasmas and Fluids, Research School of Physics and Engineering, The Australian National University
H Xia: Centre for Plasmas and Fluids, Research School of Physics and Engineering, The Australian National University
H Punzmann: Centre for Plasmas and Fluids, Research School of Physics and Engineering, The Australian National University
P W Fontana: Seattle University
M Shats: Centre for Plasmas and Fluids, Research School of Physics and Engineering, The Australian National University

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract The control of matter motion at liquid–gas interfaces opens an opportunity to create two-dimensional materials with remotely tunable properties. In analogy with optical lattices used in ultra-cold atom physics, such materials can be created by a wave field capable of dynamically guiding matter into periodic spatial structures. Here we show experimentally that such structures can be realized at the macroscopic scale on a liquid surface by using rotating waves. The wave angular momentum is transferred to floating micro-particles, guiding them along closed trajectories. These orbits form stable spatially periodic patterns, the unit cells of a two-dimensional wave-based material. Such dynamic patterns, a mirror image of the concept of metamaterials, are scalable and biocompatible. They can be used in assembly applications, conversion of wave energy into mean two-dimensional flows and for organising motion of active swimmers.

Date: 2017
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DOI: 10.1038/ncomms14325

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