arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1302.3733physics.opticscond-mat.mes-hall
收藏

具有流体动力学非局部响应的双曲超材料透镜

Hyperbolic metamaterial lens with hydrodynamic nonlocal response

Wei Yan, N. Asger Mortensen, Martijn Wubs

摘要:

我们研究了双曲型超材料(HALF)中的流体动力学非局部响应的影响,重点是实验上可实现的参数制度,其中单位细胞远小于光波长,但远大于金属成分中自由电子等离子体的纵向压力波的波长。我们推导了非局部修正的有效材料参数解析,并说明显着的非局部效应的色散曲线的数值。作为一个应用,我们发现,在局部响应近似和流体动力学Drude模型中的HMM透镜的聚焦特性可以有很大的不同。有趣的是,有时候非局部理论预测的聚焦效果要好得多。因此,为了检测非局部响应是否在双曲超材料中起作用,我们建议测量双曲超材料透镜的近场分布。

英文摘要:

We investigate the effects of hydrodynamic nonlocal response in hyperbolic metamaterials (HMMs), focusing on the experimentally realizable parameter regime where unit cells are much smaller than an optical wavelength but much larger than the wavelengths of the longitudinal pressure waves of the free-electron plasma in the metal constituents. We derive the nonlocal corrections to the effective material parameters analytically, and illustrate the noticeable nonlocal effects on the dispersion curves numerically. As an application, we find that the focusing characteristics of a HMM lens in the local-response approximation and in the hydrodynamic Drude model can differ considerably. Interestingly, sometimes the nonlocal theory predicts significantly better focusing. Thus, to detect whether nonlocal response is at work in a hyperbolic metamaterial, we propose to measure the near-field distribution of a hyperbolic metamaterial lens.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑