Nonlocal response in thin-film waveguides: Loss versus nonlocality and breaking of complementarity
Nonlocal response in thin-film waveguides: Loss versus nonlocality and breaking of complementarity
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DOI：
10.1103/physrevb.88.115401
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发表时间：
2013-09-03
影响因子：
3.7
通讯作者：
Mortensen, N. Asger
中科院分区：
文献类型：
--
作者：
Raza, Soren;Christensen, Thomas;Mortensen, N. Asger
我们研究了非局域响应对金属-绝缘体（MI）、金属-绝缘体-金属（MIM）和绝缘体-金属-绝缘体（IMI）波导的表面等离激元极化子引导特性的影响。非局域效应由线性流体动力学模型描述，其中包括金属中自由电子的托马斯-费米内动能。我们推导了三种波导结构的非局域色散关系，同时考虑了延迟和带间效应，并检查了非局域响应和金属吸收损耗之间的微妙相互作用。我们还表明，非局域性打破了 MIM 和 IMI 波导在非延迟极限中的互补性。
We investigate the effects of nonlocal response on the surface-plasmon polariton guiding properties of the metal-insulator (MI), metal-insulator-metal (MIM), and insulator-metal-insulator (IMI) waveguides. The nonlocal effects are described by a linearized hydrodynamic model, which includes the Thomas-Fermi internal kinetic energy of the free electrons in the metal. We derive the nonlocal dispersion relations of the three waveguide structures taking into account also retardation and interband effects, and examine the delicate interplay between nonlocal response and absorption losses in the metal. We also show that nonlocality breaks the complementarity of the MIM and IMI waveguides found in the nonretarded limit.