Granular phononic crystals as tunable functional switches

R. Ganesh, S. Gonella

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


In this work, we discuss a strategy for spatial and modal wave manipulation in granular phononic crystals based on the use of nonlinearity as a trigger to reversibly activate different combinations of wave modes in the crystals response. Our approach revolves around the concept of modal mixing, whereby, through the generation of higher harmonics in crystals with complex modal structures, we can induce jumps in the response across the available propagation modes; as a result, the system experiences a blend of modes and the simultaneous activation of complementary functionalities. To demonstrate the versatility of this approach, we numerically study a family of dimer granular crystal configurations featuring a variety of wave control functionalities. This approach based on modal mixing features the ability to yield a wide variety of functional configurations without changes in the shape, size or topology of the nonlinear phononic crystal.

Original languageEnglish (US)
Pages (from-to)807-810
Number of pages4
JournalPhysics Procedia
StatePublished - 2015
EventICU International Congress on Ultrasonics, ICU 2015 - Metz, France
Duration: May 11 2015May 14 2015

Bibliographical note

Funding Information:
The authors acknowledge the support of the National Science Foundation CAREER Award (CMMI-1452488).

Publisher Copyright:
© 2015 The Authors.


  • Granular Metamaterials
  • Mode Hopping


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