Aronovich Daniel, Bitan Gal, Bartal Guy
Opt Lett. 2014 Nov 15;39(22):6517-20. doi: 10.1364/OL.39.006517.
We present a semi-analytical method for accurate modeling of wave propagation in cylindrically symmetric subwavelength metal-dielectric multilayers. Utilizing a cylindrical transfer matrix method, we compute the amplitude transfer function of cylindrical hyperlens, simulate the exact field distribution and propagation for a given source and compare it to that in effective hyperbolic medium. We investigate the conditions under which the effective medium theory (EMT) is valid and show that in cylindrical configuration, a new degree of freedom is present in the applicability of the EMT-the ratio between the inner radius of the structure and the unit cell size.
我们提出了一种半解析方法，用于精确模拟圆柱对称亚波长金属-电介质多层结构中的波传播。利用圆柱传递矩阵法，我们计算了圆柱超透镜的振幅传递函数，模拟了给定源的精确场分布和传播，并将其与有效双曲介质中的情况进行比较。我们研究了有效介质理论（EMT）有效的条件，并表明在圆柱配置中，EMT适用性存在一个新的自由度——结构内半径与单位晶胞尺寸之比。
