Efficient sorting of free electron orbital angular momentum
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 inspirat...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2017-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aa5f6f |
| _version_ | 1797750846066262016 |
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| author | Benjamin J McMorran Tyler R Harvey Martin P J Lavery |
| author_facet | Benjamin J McMorran Tyler R Harvey Martin P J Lavery |
| author_sort | Benjamin J McMorran |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-12T16:39:46Z |
| format | Article |
| id | doaj.art-b18109e3e8874248aa815c561a12c1f8 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:39:46Z |
| publishDate | 2017-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-b18109e3e8874248aa815c561a12c1f82023-08-08T14:36:41ZengIOP PublishingNew Journal of Physics1367-26302017-01-0119202305310.1088/1367-2630/aa5f6fEfficient sorting of free electron orbital angular momentumBenjamin J McMorran0Tyler R Harvey1Martin P J Lavery2Department of Physics, University of Oregon , Eugene, OR, United States of AmericaDepartment of Physics, University of Oregon , Eugene, OR, United States of AmericaSchool of Engineering, University of Glasgow , Glasgow G12 8QQ, Scotland, United KingdomWe 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.https://doi.org/10.1088/1367-2630/aa5f6forbital angular momentumelectron vortexelectron microscopy |
| spellingShingle | Benjamin J McMorran Tyler R Harvey Martin P J Lavery Efficient sorting of free electron orbital angular momentum New Journal of Physics orbital angular momentum electron vortex electron microscopy |
| title | Efficient sorting of free electron orbital angular momentum |
| title_full | Efficient sorting of free electron orbital angular momentum |
| title_fullStr | Efficient sorting of free electron orbital angular momentum |
| title_full_unstemmed | Efficient sorting of free electron orbital angular momentum |
| title_short | Efficient sorting of free electron orbital angular momentum |
| title_sort | efficient sorting of free electron orbital angular momentum |
| topic | orbital angular momentum electron vortex electron microscopy |
| url | https://doi.org/10.1088/1367-2630/aa5f6f |
| work_keys_str_mv | AT benjaminjmcmorran efficientsortingoffreeelectronorbitalangularmomentum AT tylerrharvey efficientsortingoffreeelectronorbitalangularmomentum AT martinpjlavery efficientsortingoffreeelectronorbitalangularmomentum |