双层与单层声子晶体的实验示意图 (IMAGE)

Science China Press

双层与单层声子晶体的实验示意图

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在“反Klein隧穿”中，声波如撞墙般被完全反射；而在“Klein隧穿”中，声波可毫无阻碍地穿越势垒，仿佛“看不见”的墙体。

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©《中国科学》杂志社

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