2012/03/06 by Muamer Kadic, Tiemo Bückmann, Nicolas Stenger +2 · 2 citations
Physics and Astronomy · #cond-mat.mtrl-sci #physics.optics
paper · pdf · doi:10.1063/1.4709436
4 pages and 5 figures
arxiv created 2012/03/06 · arxiv updated 2015/06/04
Conceptually, all conceivable three-dimensional mechanical materials can be built from pentamode materials. Pentamodes also enable to implement three-dimensional transformation acoustics - the analogue of transformation optics. However, pentamodes have not been realized experimentally to the best of our knowledge. Here, we investigate inasmuch the pentamode theoretical ideal suggested by Milton and Cherkaev in 1995 can be approximated by a metamaterial with current state-of-the-art lithography. Using numerical calculations calibrated by our fabricated three-dimensional microstructures, we find that the figure of merit, i.e., the ratio of bulk modulus to shear modulus, can realistically be made as large as about 1,000.