A novel method for sub-wavelength focusing of flexural waves
International Journal of Mechanical Sciences(2023)
摘要
•The sub-wavelength focusing is realized via two adjacent lenses.•A critical angle distinguishing sub-wavelength focusing from normal focusing is proposed.•The sub-wavelength focusing is validated via FEM and experiments.•The sub-wavelength focusing is broadband.
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关键词
Sub-wavelength focusing,Flexural wave,Phase,Lens
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