High-Order-Harmonic Generation from a Relativistic Circularly Polarized Laser Interacting with Over-Dense Plasma Grating

被引：0

作者：

李夏至 ^{[1
]}

卓红斌 ^{[1
,2
,3
]}

邹德滨 ^{[1
]}

张世杰 ^{[1
]}

周泓宇 ^{[1
]}

赵娜 ^{[1
]}

郎跃 ^{[1
]}

余德尧 ^{[1
]}

机构：

[1] College of Science,National University of Defense Technology

[2] IFSA Collaborative Innovation Center,Shanghai Jiao Tong University

[3] Institute of Applied Physics and Computational

来源：

Chinese Physics Letters | 2017年 / 34卷 / 09期

关键词：

D O I：

暂无

中图分类号：

O53 [等离子体物理学]; TN24 [激光技术、微波激射技术];

学科分类号：

070204 ;

摘要：

The simple surface current model is extended to study the generation of high-order harmonics for a relativistic circularly polarized laser pulse interacting with a plasma grating surface. Both exact relativistic electron dynamics and optical interference of surface periodic structure are considered. It is found that high order harmonics in the specular direction are obviously suppressed whereas the harmonics of the grating periodicity are strongly enhanced and folded into small solid angles with respect to the surface direction. The conversion efficiency of certain harmonics is five orders of magnitude higher than that of the planar target cases. It provides an effective approach to generate a coherent radiation within the so-called ‘water window' while maintaining high conversion efficiency and narrow angle spread.

引用

页码：55 / 59

页数：5