Institut Langevin, LOA, UMR CNRS 7587, ESPCI, Paris, France.
Opt Lett. 2013 Jun 15;38(12):2092-4. doi: 10.1364/OL.38.002092.
A realization of a reflectionless power splitter is proposed by use of a metamaterial junction. To design the junction, the electromagnetic wave transmission in multiple connected leads is investigated theoretically and numerically. A closed analytical form is derived for the scattering matrix of any geometry of the interconnected leads. We show that the use of a junction made of ϵ-near-zero (ENZ) material allows production of perfect transmission. This can be achieved by reducing the area of the ENZ junction (squeezing effect) and by tuning the widths of the output leads with respect to the input lead. It is also shown that the same effect is obtained without squeezed junction by using a match impedance zero index material (MIZIM junction).
提出了一种利用超材料结实现无反射功率分配器的方法。为了设计该结，从理论和数值两方面研究了多连接引线中的电磁波传输。针对任意几何形状的互连引线，导出了散射矩阵的封闭解析形式。结果表明，采用ε近零（ENZ）材料制成的结可实现完美传输。通过减小 ENZ 结的面积（挤压效应）并调整输出引线相对于输入引线的宽度，可以实现这种效果。还表明，通过使用匹配阻抗零指数材料（MIZIM 结），无需挤压结也可获得相同的效果。
