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.

引用

页数：5

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