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Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic Grating Couplers at GHz Frequencies
[Image: see text] On-chip signal processing at microwave frequencies is key for modern mobile communication. When one aims at small footprints, low power consumption, reprogrammable filters, and delay lines, magnons in low-damping ferrimagnets offer great promise. Ferromagnetic grating couplers have...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7564445/ https://www.ncbi.nlm.nih.gov/pubmed/32830984 http://dx.doi.org/10.1021/acs.nanolett.0c02645 |
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author | Baumgaertl, Korbinian Gräfe, Joachim Che, Ping Mucchietto, Andrea Förster, Johannes Träger, Nick Bechtel, Michael Weigand, Markus Schütz, Gisela Grundler, Dirk |
author_facet | Baumgaertl, Korbinian Gräfe, Joachim Che, Ping Mucchietto, Andrea Förster, Johannes Träger, Nick Bechtel, Michael Weigand, Markus Schütz, Gisela Grundler, Dirk |
author_sort | Baumgaertl, Korbinian |
collection | PubMed |
description | [Image: see text] On-chip signal processing at microwave frequencies is key for modern mobile communication. When one aims at small footprints, low power consumption, reprogrammable filters, and delay lines, magnons in low-damping ferrimagnets offer great promise. Ferromagnetic grating couplers have been reported to be specifically useful as microwave-to-magnon transducers. However, their interconversion efficiency is unknown and real-space measurements of the emitted magnon wavelengths have not yet been accomplished. Here, we image with subwavelength spatial resolution the magnon emission process into ferrimagnetic yttrium iron garnet (YIG) at frequencies up to 8 GHz. We evidence propagating magnons of a wavelength of 98.7 nm underneath the gratings, which enter the YIG without a phase jump. Counterintuitively, the magnons exhibit an even increased amplitude in YIG, which is unexpected and due to a further wavelength conversion process. Our results are of key importance for magnonic components, which efficiently control microwave signals on the nanoscale. |
format | Online Article Text |
id | pubmed-7564445 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-75644452020-10-19 Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic Grating Couplers at GHz Frequencies Baumgaertl, Korbinian Gräfe, Joachim Che, Ping Mucchietto, Andrea Förster, Johannes Träger, Nick Bechtel, Michael Weigand, Markus Schütz, Gisela Grundler, Dirk Nano Lett [Image: see text] On-chip signal processing at microwave frequencies is key for modern mobile communication. When one aims at small footprints, low power consumption, reprogrammable filters, and delay lines, magnons in low-damping ferrimagnets offer great promise. Ferromagnetic grating couplers have been reported to be specifically useful as microwave-to-magnon transducers. However, their interconversion efficiency is unknown and real-space measurements of the emitted magnon wavelengths have not yet been accomplished. Here, we image with subwavelength spatial resolution the magnon emission process into ferrimagnetic yttrium iron garnet (YIG) at frequencies up to 8 GHz. We evidence propagating magnons of a wavelength of 98.7 nm underneath the gratings, which enter the YIG without a phase jump. Counterintuitively, the magnons exhibit an even increased amplitude in YIG, which is unexpected and due to a further wavelength conversion process. Our results are of key importance for magnonic components, which efficiently control microwave signals on the nanoscale. American Chemical Society 2020-08-24 2020-10-14 /pmc/articles/PMC7564445/ /pubmed/32830984 http://dx.doi.org/10.1021/acs.nanolett.0c02645 Text en This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | Baumgaertl, Korbinian Gräfe, Joachim Che, Ping Mucchietto, Andrea Förster, Johannes Träger, Nick Bechtel, Michael Weigand, Markus Schütz, Gisela Grundler, Dirk Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic Grating Couplers at GHz Frequencies |
title | Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic
Grating Couplers at GHz Frequencies |
title_full | Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic
Grating Couplers at GHz Frequencies |
title_fullStr | Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic
Grating Couplers at GHz Frequencies |
title_full_unstemmed | Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic
Grating Couplers at GHz Frequencies |
title_short | Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic
Grating Couplers at GHz Frequencies |
title_sort | nanoimaging of ultrashort magnon emission by ferromagnetic
grating couplers at ghz frequencies |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7564445/ https://www.ncbi.nlm.nih.gov/pubmed/32830984 http://dx.doi.org/10.1021/acs.nanolett.0c02645 |
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