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      Experimental investigation of amplification, via a mechanical delay-line, in a rainbow-based metasurface for energy harvesting

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          Abstract

          We demonstrate that a rainbow-based metasurface, created by a graded array of resonant rods attached to an elastic beam, operates as a mechanical delay-line by slowing down surface elastic waves to take advantage of wave interaction with resonance. Experiments demonstrate that the rainbow effect reduces the amplitude of the propagating wave in the host structure. At the same time it dramatically increases both the period of interaction between the waves and the resonators, and the wavefield amplitude in the rod endowed with the harvester. Increased energy is thus fed into the resonators over time, we show the enhanced energy harvesting capabilities of this system.

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          Author and article information

          Journal
          10 May 2020
          Article
          2005.04792
          9ee194c8-0991-4233-b00d-7cf0be2e0dda

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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          Custom metadata
          physics.app-ph physics.class-ph

          Technical & Applied physics,Classical mechanics
          Technical & Applied physics, Classical mechanics

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