中国物理B ›› 2016, Vol. 25 ›› Issue (7): 74101-074101.doi: 10.1088/1674-1056/25/7/074101
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
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)
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)
摘要: 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.
中图分类号: (Electromagnetic wave propagation; radiowave propagation)