A Caltech Library Service

Bistable metamaterial for switching and cascading elastic vibrations

Bilal, Osama R. and Foehr, André and Daraio, Chiara (2017) Bistable metamaterial for switching and cascading elastic vibrations. Proceedings of the National Academy of Sciences of the United States of America, 114 (18). pp. 4603-4606. ISSN 0027-8424. PMCID PMC5422829. doi:10.1073/pnas.1618314114.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Supplemental Material
See Usage Policy.

[img] Video (MPEG) (Movie S1) - Supplemental Material
See Usage Policy.


Use this Persistent URL to link to this item:


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.

Item Type:Article
Related URLs:
URLURL TypeDescription CentralArticle Information
Bilal, Osama R.0000-0003-3803-5084
Foehr, André0000-0003-0941-5424
Daraio, Chiara0000-0001-5296-4440
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
Funding AgencyGrant Number
ETH ZurichFEL-26 15-2
ETH ZurichETH-24 15-2
Subject Keywords:phononic metamaterials; tunable materials; phonon switching and cascading; phononic computing; acoustic transistor
Issue or Number:18
PubMed Central ID:PMC5422829
Record Number:CaltechAUTHORS:20170419-081903899
Persistent URL:
Official Citation:Osama R. Bilal, André Foehr, and Chiara Daraio Bistable metamaterial for switching and cascading elastic vibrations PNAS 2017 114 (18) 4603-4606; published ahead of print April 17, 2017, doi:10.1073/pnas.1618314114
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76656
Deposited By: Tony Diaz
Deposited On:19 Apr 2017 15:55
Last Modified:28 Mar 2022 22:13

Repository Staff Only: item control page