声超材料平板亚波长成像的理论研究
Theoretical study of subwavelength imaging by acoustic metamaterial slabs
摘要：
本文从理论上研究了超材料平板在液体介质中的亚波长成像。设计了一种具有负质量密度和正模量的超材料平板，实现了倏逝波近场亚波长成像。设计了一种同时具有负质量密度和负模量的超材料平板，实现了亚波长实像。这些结果有望为设计新型声学超材料器件提供参考。
英文摘要：
We investigate theoretically subwavelength imaging by acoustic metamaterial slabs immersed in the liquid matrix. A near-field subwavelength image formed by evanescent waves is achieved by a designed metamaterial slab with negative mass density and positive modulus. A subwavelength real image is achieved by a designed metamaterial slab with simultaneously negative mass density and modulus. These results are expected to shed some lights on designing novel devices of acoustic metamaterials.
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