Negative index metamaterial through multi-wave interactions: numerical proof of the concept of low-frequency Lamb-wave multiplexing

被引：8

作者：

Lott, Martin ^{[1
]}

Roux, Philippe ^{[1
]}

Rupin, Matthieu ^{[2
]}

Colquitt, Daniel ^{[3
]}

Colombi, Andrea ^{[4
]}

机构：

[1] Univ Savoie Mt Blanc, Univ Grenoble Alpes, ISTerre, CNRS,IRD,IFSTTAR, F-38000 Grenoble, France

[2] Hap2U, CIME Nanotech, Grenoble, France

[3] Univ Liverpool, Dept Math Sci, Liverpool L69 7ZL, Merseyside, England

[4] Swiss Fed Inst Technol, Dept Civil Environm & Geomat Engn, Inst Struct Engn, Zurich, Switzerland

来源：

SCIENTIFIC REPORTS | 2021年 / 11卷 / 01期

关键词：

D O I：

10.1038/s41598-020-79572-9

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We study numerically the potential of a multimodal elastic metamaterial to filter and guide Lamb waves in a plate. Using a sub-wavelength array of elongated beams attached to the plate, and combining the coupling effects of the longitudinal and flexural motion of these resonators, we create narrow transmission bands at the flexural resonances of the beams inside the wide frequency bandgap induced by their longitudinal resonance. The diameter of the beams becomes the tuning parameter for selection of the flexural leakage frequency, without affecting the main bandgap. Finally, by combination of the monopolar and dipolar scattering effects associated with the coupled beam and plate system, we create a frequency-based multiplexer waveguide in a locally resonant metamaterial.

引用

页数：8

共 24 条

[1] Guidance of surface waves in a micron-scale phononic crystal line-defect waveguide [J].