Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4838663
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Funding
- DFG-Center for Functional Nanostructures (CFN)
- Karlsruhe School of Optics and Photonics (KSOP)
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Pentamode metamaterials approximate tailorable artificial liquids. Recently, microscopic versions of these intricate three-dimensional structures have been fabricated, but direct experimental characterization has not been possible yet. Here, using three-dimensional printing, we fabricate macroscopic polymer-based samples with many different combinations of the small connection diameter d and the lattice constant a. Direct measurements of the static shear modulus and the Young's modulus reveal that both scale approximately according to (d/a)(3), in good agreement with continuum-mechanics calculations. For the smallest accessible values of d/a approximate to 1.5%, we find derived ratios of bulk modulus B to shear modulus G of B/G approximate to 1000. (C) 2013 AIP Publishing LLC.
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