Measuring the Orbital Angular Momentum of Electron Vortex Beams Using a Forked Grating

被引：78
|
作者：
Saitoh, Koh [1 ]
Hasegawa, Yuya [2 ]
Hirakawa, Kazuma [2 ]
Tanaka, Nobuo [1 ]
Uchida, Masaya [3 ]
机构：
[1] Nagoya Univ, EcoTopia Sci Inst, Nagoya, Aichi 4648603, Japan
[2] Nagoya Univ, Dept Crystalline Mat Sci, Nagoya, Aichi 4648603, Japan
[3] Saitama Inst Technol, Adv Sci Res Lab, Fukaya 3690293, Japan
来源：
PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 07期
关键词：
TRANSFORMATION;
D O I：
10.1103/PhysRevLett.111.074801
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The present study experimentally examines how an electron vortex beam with orbital angular momentum (OAM) undergoes diffraction through a forked grating. The nth-order diffracted electron vortex beam after passing through a forked grating with a Burgers vector of 1 shows an OAM transfer of nh. Hence, the diffraction patterns become mirror asymmetric owing to the size difference between the electron beams. Such a forked grating, when used in combination with a pinhole located at the diffraction plane, could act as an analyzer to measure the OAM of input electrons.
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页数：5
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