Phase-controlling phononic crystals: Realization of acoustic Boolean logic gates

S. Bringuier, N. Swinteck, J. O. Vasseur, J. F. Robillard, Keith A Runge, Krishna Muralidharan, Pierre A Deymier

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

A phononic crystal (PC) consisting of a square array of cylindrical Polyvinylchloride inclusions in air is used to construct a variety of acoustic logic gates. In a certain range of operating frequencies, the PC band structure shows square-like equi-frequency contours centered off the Gamma point. This attribute allows for the realization of non-collinear wave and group velocity vectors in the PC wave vector space. This feature can be utilized to control with great precision, the relative phase between propagating acoustic waves in the PC. By altering the incidence angle of the impinging acoustic beams or varying the PC thickness, interferences occur between acoustic wave pairs. It is recognized that information can be encoded with this mechanism (e.g., wave amplitudes/interference patterns) and accordingly to construct a series of logic gates emulating Boolean functions. The NAND, XOR, and NOT gates are demonstrated with finite-difference time-domain simulations of acoustic waves impinging upon the PC.

Original languageEnglish (US)
Pages (from-to)1919-1925
Number of pages7
JournalJournal of the Acoustical Society of America
Volume130
Issue number4
DOIs
Publication statusPublished - Oct 2011

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ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Arts and Humanities (miscellaneous)

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