Diffraction of relativistic vortex harmonics with fractional average orbital angular momentum

被引：0

作者：

李沙沙 ^{[1
,2
]}

沈百飞 ^{[1
,3
]}

王文鹏 ^{[1
]}

步志刚 ^{[1
]}

张浩 ^{[1
,2
]}

张辉 ^{[1
]}

翟树华 ^{[1
,2
]}

机构：

[1] State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences

[2] University of Chinese Academy of Sciences

[3] Department of Physics, Shanghai Normal University

来源：

ChineseOpticsLetters | 2019年 / 17卷 / 05期

关键词：

OAM; Diffraction of relativistic vortex harmonics with fractional average orbital angular momentum;

D O I：

暂无

中图分类号：

O436.1 [干涉与衍射];

学科分类号：

070207 ; 0803 ;

摘要：

Vortex harmonics with fractional average orbital angular momentum are generated when a relativistic fractional vortex beam is incident on and reflected from an over-dense plane plasma target. A two-step model is presented to explain the far-field patterns of the harmonics. In the first step, a fundamental spot-shaped hole is produced during the hole-boring stage, and harmonics are generated simultaneously. In the second step, different order harmonics are diffracted by the hole and propagate to the far field. This process can be accurately described by the Fraunhofer diffraction theory. This work facilitates a basic recognition of fractional vortex beams.

引用

页码：5 / 9

页数：5