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physics.class-ph2018★ 38 cited
Analysis of dispersion and propagation properties in a periodic rod using a space-fractional wave equation
John Hollkamp, Mihir Sen, Fabio Semperlotti
This study explores the use of fractional calculus as a possible tool to model wave propagation in complex, heterogeneous media. We illustrate the methodology by focusing on elasti…
physics.class-ph2017★ 89 cited
Two-Dimensional Structure-Embedded Acoustic Lenses based on Periodic Acoustic Black Holes
Hongfei Zhu, Fabio Semperlotti
Recent studies have introduced a new class of two-dimensional acoustic metamaterials whose dispersion and propagation properties results from the use of geometric inhomogeneities i…
physics.class-ph2014★ 24 cited
A passively tunable non-resonant acoustic metamaterial lens for selective ultrasonic excitation
Hongfei Zhu, Fabio Semperlotti
In this paper, we present an approach to ultrasonic beam-forming and beam-steering in structures based on the concept of embedded non-resonant acoustic metamaterial lenses. The len…