Nahvi Ehsan, Liberal Iñigo, Engheta Nader
Opt Lett. 2020 Aug 15;45(16):4591-4594. doi: 10.1364/OL.400438.
Introducing a dielectric inclusion inside an epsilon-near-zero (ENZ) host has been shown to dramatically affect the effective permeability of the host for a TM-polarized incident wave, a concept coined as photonic doping [Science355, 1058 (2017)SCIEAS0036-807510.1126/science.aal2672]. Here, we theoretically study the prospect of doping the ENZ host with infinitesimally thin perfect electric conductor (PEC) inclusions, which we call "zero-area" PEC dopants. First, we theoretically demonstrate that zero-area PEC dopants enable the design of soft surfaces with an arbitrary cross-sectional geometry. Second, we illustrate the possibility of engineering the PEC dopants with the goal of transforming the electric field distribution inside the ENZ while maintaining a spatially invariant magnetic field. We exploit this property to enhance the effective nonlinearity of the ENZ host.
在近零介电常数（ENZ）主体中引入电介质内含物已被证明会显著影响主体对TM偏振入射波的有效磁导率，这一概念被称为光子掺杂[《科学》355, 1058 (2017)SCIEAS0036 - 807510.1126/science.aal2672]。在此，我们从理论上研究了用无限薄的理想电导体（PEC）内含物对ENZ主体进行掺杂的前景，我们将其称为“零面积”PEC掺杂剂。首先，我们从理论上证明零面积PEC掺杂剂能够设计出具有任意横截面几何形状的软表面。其次，我们说明了以改变ENZ内部电场分布同时保持空间不变的磁场为目标来设计PEC掺杂剂的可能性。我们利用这一特性来增强ENZ主体的有效非线性。
