Non-reciprocal flexural wave propagation in a modulated metabeam

H. Nassar, H. Chen, A. N. Norris, G. L. Huang

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


Flexural wave propagation in an Euler–Bernoulli beam coupled to a set of spring–mass resonators is investigated in the presence of a pump wave in the form of a space–time modulation of the beam-resonators coupling stiffness. A phase matching condition implies then that waves incident along or against the pump wave behave differently and gives rise in select frequency bands to one-way blocking and conversion of waves. In particular, one-way optical–acoustic transitions are proven possible and are quantified. Various orders of magnitude of relevant physical quantities, such as gap widths and interaction lengths, are estimated so as to guide future experimental implementations.

Original languageEnglish (US)
Pages (from-to)97-102
Number of pages6
JournalExtreme Mechanics Letters
StatePublished - Sep 2017

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemical Engineering (miscellaneous)
  • Engineering (miscellaneous)
  • Mechanics of Materials
  • Mechanical Engineering


  • Non-reciprocity
  • coupled mode theory
  • directional bandgap
  • one-way mode conversion


Dive into the research topics of 'Non-reciprocal flexural wave propagation in a modulated metabeam'. Together they form a unique fingerprint.

Cite this