图3 面向超宽带声波聚焦的消色差超构表面 (IMAGE)

Science China Press

图3 面向超宽带声波聚焦的消色差超构表面

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a, 逆向设计的超构表面；b, 理论与优化的折射率；c, 单元的透射率；d, 多频率声波聚焦；e, 焦平面的声强分布

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©《中国科学》杂志社

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