Metamaterial with simultaneously negative bulk modulus and mass density
Metamaterial with simultaneously negative bulk modulus and mass density
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DOI：
10.1103/physrevlett.99.093904
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发表时间：
2007-08-31
影响因子：
8.6
通讯作者：
Shi, Jing
中科院分区：
文献类型：
--
作者：
Ding, Yiqun;Liu, Zhengyou;Shi, Jing
我们报道了一种同时具有负体积模量和负质量密度的超材料。这种超材料是一种锌层结构，由一个面心立方的含气泡的水球（BWS）阵列和另一个相对移位的面心立方的橡胶涂覆的金球（RGSs）阵列在环氧树脂基体。负体积模量和负质量密度同时来源于嵌入BWS的单极共振和嵌入RGS的偶极共振。超材料的泊松比在共振频率附近也变为负值。
We report a metamaterial which simultaneously possesses a negative bulk modulus and mass density. This metamaterial is a zinc blende structure consisting of one fcc array of bubble-contained-water spheres (BWSs) and another relatively shifted fcc array of rubber-coated-gold spheres (RGSs) in epoxy matrix. The negative bulk modulus and mass density are simultaneously derived from the coexistent monopolar resonances from the embedded BWSs and dipolar resonances from the embedded RGSs. The Poisson ratio of the metamaterial also turns negative near the resonance frequency.