Production of electron vortex beams carrying large orbital angular momentum using spiral zone plates | Zendy

Koh Saitoh | Zendy; Yuya Hasegawa | Zendy; Nozomi Tanaka | Zendy; Masaya Uchida | Zendy

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Production of electron vortex beams carrying large orbital angular momentum using spiral zone plates

Author(s) -

Koh Saitoh,

Yuya Hasegawa,

Nozomi Tanaka,

Masaya Uchida

Publication year - 2012

Publication title -

journal of electron microscopy

Language(s) - English

Resource type - Journals

eISSN - 1477-9986

pISSN - 0022-0744

DOI - 10.1093/jmicro/dfs036

Subject(s) - vortex , angular momentum , physics , electron , beam (structure) , spiral (railway) , cathode ray , optical vortex , optics , diffraction , vortex ring , classical mechanics , mechanics , quantum mechanics , mathematical analysis , mathematics

We report the production of electron vortex beams carrying large orbital angular momentum (OAM) using micro-fabricated spiral zone plates. A series of the spherical waves, focussing onto different positions along the propagating direction of the electron beam, were observed. The nth order vortex beam has an OAM n times larger than that of the first-order vortex beam. We observed an electron vortex with an OAM up to in a high-order diffracted wave. A linear dependence of the diameter of the vortex beam on the OAM was observed, being consistent to numerical simulations.

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