Smith-Purcell radiation from a grating of negative-index material
Smith-Purcell radiation from a grating of negative-index material
复制标题
DOI：
10.1016/j.nima.2011.02.022
复制
发表时间：
2011-05
影响因子：
1.4
通讯作者：
Dazhi Li;M. Hangyo;Zhonghai Yang;M. Asakawa;S. Miyamoto;Y. Tsunawaki;K. Takano;K. Imasaki
中科院分区：
文献类型：
--
作者：
Dazhi Li;M. Hangyo;Zhonghai Yang;M. Asakawa;S. Miyamoto;Y. Tsunawaki;K. Takano;K. Imasaki
分析了来自线电荷的史密斯-珀塞尔辐射，该线电荷以恒定速度平行于由负折射率超材料制成的光栅移动。通过理论分析和计算，我们表明负折射率材料光栅的史密斯-珀塞尔辐射比正折射率材料和完美导体的史密斯-珀塞尔辐射更强。此外，我们发现辐射很大程度上取决于磁导率和介电常数的值。对锯齿型和矩形型光栅也进行了计算和论证。
Smith-Purcell radiation from an electric line charge that moves, at constant speed, parallel to a grating made of metamaterial with negative index is analyzed. Through theoretical analysis and computations, we show that the Smith-Purcell radiation is stronger from a grating of negative-index material, than that from a positive-index material and perfect conductor. Also, we found that the radiation strongly depends on the values of permeability and permittivity. Calculations on grating with saw-like profile and rectangular profile are also carried out and demonstrated.