Zak phase and band inversion in dimerized one-dimensional locally resonant metamaterials
Zak phase and band inversion in dimerized one-dimensional locally resonant metamaterials
复制标题
二聚化一维局部谐振超材料中的 Zak 相位和能带反转
DOI：
10.1103/physrevb.97.195307
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发表时间：
2018-02
影响因子：
3.7
通讯作者：
Chen Hong
中科院分区：
文献类型：
--
作者：
Zhu Weiwei;Ding Ya-qiong;Ren Jie;Sun Yong;Li Yunhui;Jiang Haitao;Chen Hong
扎克相是指一个粒子在布里渊区移动时所获得的贝里相，它表征了一维周期系统中布洛赫带的拓扑性质。这里是二聚化一维局域共振中的扎克相……（原文最后一个单词“reso”似乎不完整）
Zak phase, which refers to the Berry's phase picked up by a particle moving across the Brillouin zone, characterizes the topological properties of Bloch bands in one-dimensional periodic system. Here the Zak phase in dimerized one-dimensional locally resonant metamaterials is investigated. It is found that there are some singular points in the bulk band across which the Bloch states contribute {\pi} to the Zak phase, whereas while in the rest of the band the contribution is nearly zero. These singular points associated with zero reflection are caused by two different mechanisms: the dimerization-independent anti-resonating of each branch, and the dimerization-dependent destructive interference in multiple backscattering. The structure undergoes a topological transition point in the band structure where the band inverts and the Zak phase, which is determined by the numbers of singular points in the bulk band, changes following a shift in dimerization parameter. Finally, the interface state between two dimerized metamaterial structures with different topological property in the first band gap is demonstrated experimentally. The quasi-one-dimensional configuration of the system allows one to explore topology-inspired new methods and applications in the sub-wavelength scale.
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影响因子：
3.7
作者：
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通讯作者：
Jun‐Won Rhim;Jan Behrends;J. Bardarson
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作者：
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64.8
作者：
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通讯作者：
Lerosey, Geoffroy
影响因子：
3.6
作者：
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通讯作者：
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影响因子：
8.6
作者：
THOULESS, DJ;KOHMOTO, M;DENNIJS, M
通讯作者：
DENNIJS, M