​Rotational modes in phononic crystals can be excited by shear waves. We started from the mass-spring description and developed a lumped model for rotational modes in phononic crystals.  This model successfully

  • reveals the origin of the rotation modes: finite size effect and divergence free
  • provides a simple understanding of the mechanism
  • predicts the dispersion relation


​Prof. Jun Mei, Prof. Zhengyou Liu, Prof. Chunyin Qiu


​Pai Peng, Jun Mei and Ying Wu "Lumped Model for Rotational Modes in Phononic Crystals" arXiv 1208.6526