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Broadband sub-diffraction and ultra-high energy density focusing of elastic waves in planar gradient-index lenses

Zhao, JF; Cui, XD; Bonello, B; Djafari-Rouhani, B; Yuan, WT; Pan, YD; Ren, J; Zhang, XQ; Zhong, Z

Zhong, Z (corresponding author), Tongji Univ, Sch Aerosp Engn & Appl Mech, 100 Zhangwu Rd, Shanghai 200092, Peoples R China.

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 2021; 150 ():

Abstract

We demonstrate experimentally and theoretically the broadband sub-diffraction and ultra-high energy density focusing of elastic wave inside planar gra......

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