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Published May 2, 2017 | Supplemental Material + Published
Journal Article Open

Bistable metamaterial for switching and cascading elastic vibrations


The realization of acoustic devices analogous to electronic systems, like diodes, transistors, and logic elements, suggests the potential use of elastic vibrations (i.e., phonons) in information processing, for example, in advanced computational systems, smart actuators, and programmable materials. Previous experimental realizations of acoustic diodes and mechanical switches have used nonlinearities to break transmission symmetry. However, existing solutions require operation at different frequencies or involve signal conversion in the electronic or optical domains. Here, we show an experimental realization of a phononic transistor-like device using geometric nonlinearities to switch and amplify elastic vibrations, via magnetic coupling, operating at a single frequency. By cascading this device in a tunable mechanical circuit board, we realize the complete set of mechanical logic elements and interconnect selected ones to execute simple calculations.

Additional Information

© 2017 National Academy of Sciences. Edited by Rajeev Ram, Massachusetts Institute of Technology, Cambridge, MA, and accepted by Editorial Board Member Evelyn L. Hu March 17, 2017 (received for review November 3, 2016). Published online before print April 17, 2017. The authors thank Sandeep Deshpande for assisting in the construction of the setup of the signal amplification experiment. The authors acknowledge the fruitful discussions with V. Costanza, R. Di Giacomo, and M. S. Garcia. This work was supported by ETH Postdoctoral Fellowship FEL-26 15-2 (to O.R.B.) and ETH Grant ETH-24 15-2. Author contributions: O.R.B. and C.D. designed research; O.R.B. and A.F. performed research; O.R.B., A.F., and C.D. analyzed data; and O.R.B., A.F., and C.D. wrote the paper. The authors declare no conflict of interest. This article is a PNAS Direct Submission. R.R. is a guest editor invited by the Editorial Board. This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1618314114/-/DCSupplemental.

Attached Files

Published - PNAS-2017-Bilal-4603-6.pdf

Supplemental Material - pnas.1618314114.sm01.mp4

Supplemental Material - pnas.201618314SI.pdf


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