Details

Autor(en) / Beteiligte

• McMorran, Benjamin J
• Harvey, Tyler R
• Lavery, Martin P J

Titel

Efficient sorting of free electron orbital angular momentum

Ist Teil von

• New journal of physics, 2017-02, Vol.19 (2), p.23053

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• We propose a method for sorting electrons by orbital angular momentum (OAM). Several methods now exist to prepare electron wavefunctions in OAM states, but no technique has been developed for efficient, parallel measurement of pure and mixed electron OAM states. The proposed technique draws inspiration from the recent demonstration of the sorting of OAM through modal transformation. We show that the same transformation can be performed on electrons with electrostatic optical elements. Specifically, we show that a charged needle and an array of electrodes perform the transformation and phase correction necessary to sort OAM states. This device may enable the analysis of the spatial mode distribution of inelastically scattered electrons.