基于玻尔模型的原子级薄球形壳状超散射体。

Atomically thin spherical shell-shaped superscatterers based on a Bohr model.

作者信息

Li Rujiang, Lin Xiao, Lin Shisheng, Liu Xu, Chen Hongsheng

机构信息

State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, People's Republic of China. College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China. The Electromagnetics Academy of Zhejiang University, Zhejiang University, Hangzhou 310027, People's Republic of China.

出版信息

Nanotechnology. 2015 Dec 18;26(50):505201. doi: 10.1088/0957-4484/26/50/505201. Epub 2015 Nov 18.

DOI:10.1088/0957-4484/26/50/505201

PMID:26580845

Abstract

Graphene monolayers can be used for atomically thin three-dimensional shell-shaped superscatterer designs. Due to the excitation of the first-order resonance of transverse magnetic (TM) graphene plasmons, the scattering cross section of the bare subwavelength dielectric particle is enhanced significantly by five orders of magnitude. The superscattering phenomenon can be intuitively understood and interpreted with a Bohr model. In addition, based on the analysis of the Bohr model, it is shown that contrary to the TM case, superscattering is hard to achieve by exciting the resonance of transverse electric (TE) graphene plasmons due to their poor field confinements.

摘要

石墨烯单分子层可用于原子级薄的三维壳状超散射体设计。由于横向磁（TM）石墨烯等离激元的一阶共振被激发，裸亚波长介电粒子的散射截面显著增强了五个数量级。超散射现象可以用玻尔模型直观地理解和解释。此外，基于玻尔模型的分析表明，与TM情况相反，由于横向电（TE）石墨烯等离激元的场限制较差，通过激发它们的共振很难实现超散射。