Optimization of loss and gain multilayers for reducing the scattering of a perfect conducting cylinder

doi:10.1088/1674-1056/25/7/074101

Abstract Reduction of electromagnetic scattering from a conducting cylinder could be achieved by covering it with optimized multilayers of normal dielectric and plasmonic material. The plasmonic material with intrinsic losses could degrade the cloaking effect. Using a genetic algorithm, we present the optimized design of loss and gain multilayers for reduction of the scattering from a perfect conducting cylinder. This multilayered structure is theoretically and numerically analyzed when the plasmonic material with low loss and high loss respectively is considered. We demonstrate by full-wave simulation that the optimized nonmagnetic gain-loss design can greatly compensate the decreased cloaking effect caused by loss material, which facilitates the realization of practical electromagnetic cloaking, especially in the optical range.

Keywords: transformation optics invisibility cloak metamaterial

Received: 30 September 2015
Revised: 01 February 2016
Accepted manuscript online:

PACS:	41.20.Jb	(Electromagnetic wave propagation; radiowave propagation)
	42.25.Fx	(Diffraction and scattering)
	42.79.-e	(Optical elements, devices, and systems)

Fund: Project supported by the Research Foundation of Jinling Institute of Technology, China (Grant No. JIT-B-201426), the Jiangsu Modern Education and Technology Key Project, China (Grant No. 2014-R-31984), the Jiangsu 333 Project Funded Research Project, China (Grant No. BRA2010004), and the University Science Research Project of Jiangsu Province, China (Grant No. 15KJB520010).

Corresponding Authors: Zhen-Zhong Yu
E-mail: nanfish@jit.edu.cn

Cite this article:

Zhen-Zhong Yu(余振中), Guo-Shu Zhao(赵国树), Gang Sun(孙罡), Hai-Fei Si(司海飞), Zhong Yang(杨忠) Optimization of loss and gain multilayers for reducing the scattering of a perfect conducting cylinder 2016 Chin. Phys. B 25 074101

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Optimization of loss and gain multilayers for reducing the scattering of a perfect conducting cylinder

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