金属薄膜中二维亚波长孔阵列的非互易光反射
Non-reciprocal optical reflection from a bidimensional array of subwavelength holes in a metallic film
摘要：
利用模拟和理论论证，我们研究了沉积在玻璃衬底上的穿孔金膜的镜面反射。一个正方形晶格的圆柱形孔被假定为产生的周期性的横向散射需要杂交的表面等离子体与辐射状态。它示出，对比传输方法，在膜的任一侧上的反射的知识提供单独的信息上的金真空表面等离子体激元和金玻璃界面等离子体激元。最近的实验数据，该系统的具体实施进行了重新审查，这些显示出良好的协议之间的测量反射和模拟在两个方向的入射波探头。这证实了在远场评估表面等离子体特性时考虑反射不对称性的重要性。
英文摘要：
Using simulations and theoretical arguments we investigate the specular reflection of a perforated gold film deposited on a glass substrate. A square lattice of cylindrical holes is assumed to produce the periodic lateral corrugation needed to hybridize the surface plasmons with radiative states. It is shown that, contrasting transmission approaches, a knowledge of the reflection on either side of the film provides separate information on the gold-vacuum surface plasmons and on the gold-glass interface plasmons. Recent experimental data on a specific implementation of this system are reexamined; these show a good agreement between the measured reflections and the simulations in both directions of incident wave probes. This confirms the importance of taking into account the reflection asymmetry in the far-field assessment of surface plasmons properties.
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