Papers Published

1. Popa, BI; Cummer, SA, Unified approach to design linear and nonlinear acoustic metamaterials, 2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, Metamaterials 2014 (November, 2014), pp. 241-243, IEEE [doi] .
   (last updated on 2023/06/01)

   Abstract:
   We review a new approach to design active acoustic metematerials that results in artificial media covering a large range of linear acoustic responses. We show how this method can be extended to obtain metamaterials having highly non-linear responses. We illustrate it experimentally by implementing a medium that produces second harmonics of higher intensity than the fundamental. This is an important property that can be leveraged in many non-linear applications, including the implementation of highly sub-wavelength unidirectional media capable of breaking the time-reversal symmetry.