In this talk, the plasmon resonances for curved nanorods which present anisotropic Geometries is considered. We analyze quantitative properties of the plasmon resonance and its relationship to the metamaterial configurations and the anisotropic geometries of the nanorods. Based on delicate and subtle asymptotic and spectral analysis of the layer potential operators, particularly the Neumann-Poincare operators, associated with anisotropic geometries, we derive sharp asymptotic formulae of the corresponding scattering field in the quasi-static regime. By carefully analyzing the asymptotic formulae, we establish sharp conditions that can ensure the occurrence of the plasmon resonance. The resonance conditions couple the metamaterial parameters, the wave frequency and the nanorod geometry in an intricate but elegant manner. We provide thorough resonance analysis by studying the wave fields both inside and outside the nanorod. Furthermore, our quantitative analysis indicates that different parts of the nanorod induce varying degrees of resonance. Specically, the resonant strength at the two end-parts of the curved nanorod is more outstanding than that of the facade-part of the nanorod.
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郑光辉,湖南大学数学学院,副教授,硕士生导师。2012年博士毕业于兰州大学数学与统计学院,2015年3月--2016年3月访问巴黎高师数学系并进行合作研究。主要从事偏微分方程反问题的理论及算法、贝叶斯统计反演与推断、隐形设计、等离子共振及超分辨成像等方面的研究。相关研究成果发表在《Inverse Problems》、《SIAM Journal on Numerical Analysis》、《 J. Differential Equations》、《Advances in Computational Mathematics》等20多个SCI杂志上。主持过国家自然科学青年基金1项,正主持湖南省面上项目1项。