Elastostatics within multi-layer metamaterial structures and an algebraic framework for polariton resonances

被引:4
|
作者
Deng, Youjun [1 ]
Kong, Lingzheng [1 ]
Liu, Hongyu [2 ]
Zhu, Liyan [1 ]
机构
[1] Cent South Univ, Sch Math & Stat, Changsha 410083, Peoples R China
[2] City Univ Hong Kong, Dept Math, Hong Kong, Peoples R China
关键词
Multi-layer solid structure; negative elastic materials; polariton resonance; elastic momentum matrix; spectral analysis; characteristic polynomial; PLASMON RESONANCE; CLOAKING; ENHANCEMENT; NANOPARTICLES; SCATTERING; OPERATOR;
D O I
10.1051/m2an/2024041
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
Multi-layer structures are ubiquitous in constructing metamaterial devices to realise various frontier applications including super-resolution imaging and invisibility cloaking. In this paper, we develop a general mathematical framework for studying elastostatics within multi-layer material structures in Rd, d = 2, 3. The multi-layer structure is formed by concentric balls and each layer is filled by either a regular elastic material or an elastic metamaterial. The number of layers can be arbitrary and the material parameters in each layer may be different from one another. In practice, the multi-layer structure can serve as the building block for various material devices. Considering the impingement of an incident field on the multi-layer structure, we first derive the exact perturbed field in terms of an elastic momentum matrix, whose dimension is the same as the number of layers. By highly intricate and delicate analysis, we derive a comprehensive study of the spectral properties of the elastic momentum matrix. This enables us to establish a handy algebraic framework for studying polariton resonances associated with multi-layer metamaterial structures, which forms the fundamental basis for many metamaterial applications.
引用
收藏
页码:1413 / 1440
页数:28
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