论文标题
金属和介电光栅的史密斯丝辐射的频域计算
Frequency-domain calculation of Smith-Purcell radiation for metallic and dielectric gratings
论文作者
论文摘要
在频域模拟中比较了金属和介电光栅（硅，硅）的史密斯丝辐射的强度。讨论并使用用于Cherenkov辐射的Frank-Tamm公式进行了讨论和验证。对于30个KEV电子，矩形电介质光栅的效率不如其金属对应物，硅的数量级和二氧化硅的两个数量级。对于所有研究的光栅，辐射强度都会因光磁共振而带有光栅齿高度的振荡。比较3D和2D数值模型。
The intensity of Smith-Purcell radiation from metallic and dielectric gratings (silicon, silica) is compared in a frequency-domain simulation. The numerical model is discussed and verified with the Frank-Tamm formula for Cherenkov radiation. For 30 keV electrons, rectangular dielectric gratings are less efficient than their metallic counterpart, by an order of magnitude for silicon, and two orders of magnitude for silica. For all gratings studied, radiation intensity oscillates with grating tooth height due to electromagnetic resonances in the grating. 3D and 2D numerical models are compared.
