Graphene Nanopore Arrays for Electron Focusing and Antifocusing
We have shown, via numerical simulations, that a symmetric array of nanopores with appropriately designed shapes and sizes arranged along an arc of a circle in a graphene nanoribbon can focus or antifocus an incident ballistic electron wavefunction. The position of the focal/antifocal region depends...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/3/529 |
| _version_ | 1797485775942582272 |
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| author | Damir Mladenovic Daniela Dragoman |
| author_facet | Damir Mladenovic Daniela Dragoman |
| author_sort | Damir Mladenovic |
| collection | DOAJ |
| description | We have shown, via numerical simulations, that a symmetric array of nanopores with appropriately designed shapes and sizes arranged along an arc of a circle in a graphene nanoribbon can focus or antifocus an incident ballistic electron wavefunction. The position of the focal/antifocal region depends on the electron energy. This effect, which takes place in the energy interval of one-transverse-mode propagation in the nanoribbon, highlights the similarities with plasmonic focusing by an array of holes in a metallic sheet, while emphasizing the differences between the propagation and excitation of electrons and electromagnetic fields. In particular, the electronic antilens has no counterpart in classical optics. |
| first_indexed | 2024-03-09T23:23:39Z |
| format | Article |
| id | doaj.art-a98450a906f04f93ac0617a64404635e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T23:23:39Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-a98450a906f04f93ac0617a64404635e2023-11-23T17:22:17ZengMDPI AGNanomaterials2079-49912022-02-0112352910.3390/nano12030529Graphene Nanopore Arrays for Electron Focusing and AntifocusingDamir Mladenovic0Daniela Dragoman1National Institute for Research and Development in Microtechnology (IMT), Str. Erou Iancu Nicolae 126A, 077190 Voluntari, RomaniaPhysics Faculty, University of Bucharest, P.O. Box MG-11, 077125 Bucharest-Magurele, RomaniaWe have shown, via numerical simulations, that a symmetric array of nanopores with appropriately designed shapes and sizes arranged along an arc of a circle in a graphene nanoribbon can focus or antifocus an incident ballistic electron wavefunction. The position of the focal/antifocal region depends on the electron energy. This effect, which takes place in the energy interval of one-transverse-mode propagation in the nanoribbon, highlights the similarities with plasmonic focusing by an array of holes in a metallic sheet, while emphasizing the differences between the propagation and excitation of electrons and electromagnetic fields. In particular, the electronic antilens has no counterpart in classical optics.https://www.mdpi.com/2079-4991/12/3/529graphene nanoribbonnanoporeselectron lens |
| spellingShingle | Damir Mladenovic Daniela Dragoman Graphene Nanopore Arrays for Electron Focusing and Antifocusing Nanomaterials graphene nanoribbon nanopores electron lens |
| title | Graphene Nanopore Arrays for Electron Focusing and Antifocusing |
| title_full | Graphene Nanopore Arrays for Electron Focusing and Antifocusing |
| title_fullStr | Graphene Nanopore Arrays for Electron Focusing and Antifocusing |
| title_full_unstemmed | Graphene Nanopore Arrays for Electron Focusing and Antifocusing |
| title_short | Graphene Nanopore Arrays for Electron Focusing and Antifocusing |
| title_sort | graphene nanopore arrays for electron focusing and antifocusing |
| topic | graphene nanoribbon nanopores electron lens |
| url | https://www.mdpi.com/2079-4991/12/3/529 |
| work_keys_str_mv | AT damirmladenovic graphenenanoporearraysforelectronfocusingandantifocusing AT danieladragoman graphenenanoporearraysforelectronfocusingandantifocusing |