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Optical Engineering • Open Access

Fractional Fourier analysis of elastic wave scattering in inhomogeneous materials
Author(s): Yuanzhang Fan; Xiangyang Lu

Paper Abstract

To describe the elastic wave scattering, which reflects the performance of propagation control materials, the approximate directional cloaks of an elastic wave are designed using the zero- and first-order approximation coordinate transformation method. Because the convergence features of fractional Fourier transform (FRFT) are more acute and sensitive to the frequency change than those of short time Fourier transform, the spatial signals in the designed materials are transformed in the FRFT domain. The spatial frequency changes of elastic waves through inhomogeneous materials are quantitatively analyzed under several circumstances. The provided time-frequency analysis method with FRFT can support the design evaluation of the material parameters.

Paper Details

Date Published: 7 November 2016
PDF: 4 pages
Opt. Eng. 55(11) 110501 doi: 10.1117/1.OE.55.11.110501
Published in: Optical Engineering Volume 55, Issue 11
Show Author Affiliations
Yuanzhang Fan, Beijing Institute of Technology (China)
Zhongyuan Univ. of Technology (China)
Xiangyang Lu, Zhongyuan Univ. of Technology (China)

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