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Real-space imaging of acoustic plasmons in large-area graphene grown by chemical vapor deposition

An acoustic plasmon mode in a graphene-dielectric-metal structure has recently been spotlighted as a superior platform for strong light-matter interaction. It originates from the coupling of graphene plasmon with its mirror image and exhibits the largest field confinement in the limit of a sub-nm-th...

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Autores principales: Menabde, Sergey G., Lee, In-Ho, Lee, Sanghyub, Ha, Heonhak, Heiden, Jacob T., Yoo, Daehan, Kim, Teun-Teun, Low, Tony, Lee, Young Hee, Oh, Sang-Hyun, Jang, Min Seok
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7895983/
https://www.ncbi.nlm.nih.gov/pubmed/33608541
http://dx.doi.org/10.1038/s41467-021-21193-5
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author Menabde, Sergey G.
Lee, In-Ho
Lee, Sanghyub
Ha, Heonhak
Heiden, Jacob T.
Yoo, Daehan
Kim, Teun-Teun
Low, Tony
Lee, Young Hee
Oh, Sang-Hyun
Jang, Min Seok
author_facet Menabde, Sergey G.
Lee, In-Ho
Lee, Sanghyub
Ha, Heonhak
Heiden, Jacob T.
Yoo, Daehan
Kim, Teun-Teun
Low, Tony
Lee, Young Hee
Oh, Sang-Hyun
Jang, Min Seok
author_sort Menabde, Sergey G.
collection PubMed
description An acoustic plasmon mode in a graphene-dielectric-metal structure has recently been spotlighted as a superior platform for strong light-matter interaction. It originates from the coupling of graphene plasmon with its mirror image and exhibits the largest field confinement in the limit of a sub-nm-thick dielectric. Although recently detected in the far-field regime, optical near-fields of this mode are yet to be observed and characterized. Here, we demonstrate a direct optical probing of the plasmonic fields reflected by the edges of graphene via near-field scattering microscope, revealing a relatively small propagation loss of the mid-infrared acoustic plasmons in our devices that allows for their real-space mapping at ambient conditions even with unprotected, large-area graphene grown by chemical vapor deposition. We show an acoustic plasmon mode that is twice as confined and has 1.4 times higher figure of merit in terms of the normalized propagation length compared to the graphene surface plasmon under similar conditions. We also investigate the behavior of the acoustic graphene plasmons in a periodic array of gold nanoribbons. Our results highlight the promise of acoustic plasmons for graphene-based optoelectronics and sensing applications.
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spelling pubmed-78959832021-03-03 Real-space imaging of acoustic plasmons in large-area graphene grown by chemical vapor deposition Menabde, Sergey G. Lee, In-Ho Lee, Sanghyub Ha, Heonhak Heiden, Jacob T. Yoo, Daehan Kim, Teun-Teun Low, Tony Lee, Young Hee Oh, Sang-Hyun Jang, Min Seok Nat Commun Article An acoustic plasmon mode in a graphene-dielectric-metal structure has recently been spotlighted as a superior platform for strong light-matter interaction. It originates from the coupling of graphene plasmon with its mirror image and exhibits the largest field confinement in the limit of a sub-nm-thick dielectric. Although recently detected in the far-field regime, optical near-fields of this mode are yet to be observed and characterized. Here, we demonstrate a direct optical probing of the plasmonic fields reflected by the edges of graphene via near-field scattering microscope, revealing a relatively small propagation loss of the mid-infrared acoustic plasmons in our devices that allows for their real-space mapping at ambient conditions even with unprotected, large-area graphene grown by chemical vapor deposition. We show an acoustic plasmon mode that is twice as confined and has 1.4 times higher figure of merit in terms of the normalized propagation length compared to the graphene surface plasmon under similar conditions. We also investigate the behavior of the acoustic graphene plasmons in a periodic array of gold nanoribbons. Our results highlight the promise of acoustic plasmons for graphene-based optoelectronics and sensing applications. Nature Publishing Group UK 2021-02-19 /pmc/articles/PMC7895983/ /pubmed/33608541 http://dx.doi.org/10.1038/s41467-021-21193-5 Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Menabde, Sergey G.
Lee, In-Ho
Lee, Sanghyub
Ha, Heonhak
Heiden, Jacob T.
Yoo, Daehan
Kim, Teun-Teun
Low, Tony
Lee, Young Hee
Oh, Sang-Hyun
Jang, Min Seok
Real-space imaging of acoustic plasmons in large-area graphene grown by chemical vapor deposition
title Real-space imaging of acoustic plasmons in large-area graphene grown by chemical vapor deposition
title_full Real-space imaging of acoustic plasmons in large-area graphene grown by chemical vapor deposition
title_fullStr Real-space imaging of acoustic plasmons in large-area graphene grown by chemical vapor deposition
title_full_unstemmed Real-space imaging of acoustic plasmons in large-area graphene grown by chemical vapor deposition
title_short Real-space imaging of acoustic plasmons in large-area graphene grown by chemical vapor deposition
title_sort real-space imaging of acoustic plasmons in large-area graphene grown by chemical vapor deposition
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7895983/
https://www.ncbi.nlm.nih.gov/pubmed/33608541
http://dx.doi.org/10.1038/s41467-021-21193-5
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