Experimental Observation of Topologically Protected Helical Edge Modes in Patterned Elastic Plates

  title={Experimental Observation of Topologically Protected Helical Edge Modes in Patterned Elastic Plates},
  author={Marco Miniaci and Raj Kumar Pal and Bruno Morvan and Massimo Ruzzene},
  journal={Physical Review X},
The investigation of topologically protected waves in classical media has opened unique opportunities to achieve exotic properties like one-way phonon transport, protection from backscattering and immunity to imperfections. Contrary to acoustic and electromagnetic domains, their observation in elastic solids has so far been elusive due to the presence of both shear and longitudinal modes and their modal conversion at interfaces and free surfaces. Here we report the experimental observation of… 

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