Uni-modal retroreflection in multi-modal elastic wave fields
International Journal of Mechanical Sciences(2022)
摘要
•We present a novel principle of perfect retroreflection of elastic waves.•A uniquely engineered meta-corner reflector can realize the proposed principle.•Our findings are validated theoretically, numerically, and experimentally.•Its application in measuring a thickness of a thin film is presented.
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关键词
Elastic waves,Retroreflection,Metamaterials,Ultrasound techniques
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