Gradient Index Devices for the Simultaneous Focusing of the S0 and A0 Lamb Modes
Classical Physics
2015-02-20 v1 Optics
Abstract
Gradient index devices for the simultaneous control of the S 0 and A 0 Lamb modes are presented and numerically analysed. It is found a special relationship between the refractive indexes for these two modes which allows their simultaneous control by means of graded phononic crystals and thickness variations of the plate. A flat gradient index lens and a circular Luneburg lens are designed. Numerical simulations show that the performance of these devices is good for the two modes in a broadband frequency region, and that this approach can be used to design more advanced refractive devices for the total control of guided vibrational modes.
Keywords
Cite
@article{arxiv.1502.05423,
title = {Gradient Index Devices for the Simultaneous Focusing of the S0 and A0 Lamb Modes},
author = {Yabin Jin and Daniel Torrent and Yan Pennec and Yongdong Pan and Bahram Djafari-Rouhani},
journal= {arXiv preprint arXiv:1502.05423},
year = {2015}
}