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Squeezing Millimeter Waves through a Single, Nanometer-wide, Centimeter-long Slit

We demonstrate broadband non-resonant squeezing of terahertz (THz) waves through an isolated 2-nm-wide, 2-cm-long slit (aspect ratio of 10(7)), representing a maximum intensity enhancement factor of one million. Unlike resonant nanogap structures, a single, effectively infinitely-long slit passes in...

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Autores principales: Chen, Xiaoshu, Park, Hyeong-Ryeol, Lindquist, Nathan C., Shaver, Jonah, Pelton, Matthew, Oh, Sang-Hyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4208056/
https://www.ncbi.nlm.nih.gov/pubmed/25342288
http://dx.doi.org/10.1038/srep06722
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author Chen, Xiaoshu
Park, Hyeong-Ryeol
Lindquist, Nathan C.
Shaver, Jonah
Pelton, Matthew
Oh, Sang-Hyun
author_facet Chen, Xiaoshu
Park, Hyeong-Ryeol
Lindquist, Nathan C.
Shaver, Jonah
Pelton, Matthew
Oh, Sang-Hyun
author_sort Chen, Xiaoshu
collection PubMed
description We demonstrate broadband non-resonant squeezing of terahertz (THz) waves through an isolated 2-nm-wide, 2-cm-long slit (aspect ratio of 10(7)), representing a maximum intensity enhancement factor of one million. Unlike resonant nanogap structures, a single, effectively infinitely-long slit passes incident electromagnetic waves with no cutoff, enhances the electric field within the gap with a broad 1/f spectral response, and eliminates interference effects due to finite sample boundaries and adjacent elements. To construct such a uniform, isolated slit that is much longer than the millimeter-scale spot of a THz beam, we use atomic layer lithography to pattern vertical nanogaps in a metal film over an entire 4-inch wafer. We observe an increasing field enhancement as the slit width decreases from 20 nm to 2 nm, in agreement with numerical calculations.
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spelling pubmed-42080562014-10-27 Squeezing Millimeter Waves through a Single, Nanometer-wide, Centimeter-long Slit Chen, Xiaoshu Park, Hyeong-Ryeol Lindquist, Nathan C. Shaver, Jonah Pelton, Matthew Oh, Sang-Hyun Sci Rep Article We demonstrate broadband non-resonant squeezing of terahertz (THz) waves through an isolated 2-nm-wide, 2-cm-long slit (aspect ratio of 10(7)), representing a maximum intensity enhancement factor of one million. Unlike resonant nanogap structures, a single, effectively infinitely-long slit passes incident electromagnetic waves with no cutoff, enhances the electric field within the gap with a broad 1/f spectral response, and eliminates interference effects due to finite sample boundaries and adjacent elements. To construct such a uniform, isolated slit that is much longer than the millimeter-scale spot of a THz beam, we use atomic layer lithography to pattern vertical nanogaps in a metal film over an entire 4-inch wafer. We observe an increasing field enhancement as the slit width decreases from 20 nm to 2 nm, in agreement with numerical calculations. Nature Publishing Group 2014-10-24 /pmc/articles/PMC4208056/ /pubmed/25342288 http://dx.doi.org/10.1038/srep06722 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/
spellingShingle Article
Chen, Xiaoshu
Park, Hyeong-Ryeol
Lindquist, Nathan C.
Shaver, Jonah
Pelton, Matthew
Oh, Sang-Hyun
Squeezing Millimeter Waves through a Single, Nanometer-wide, Centimeter-long Slit
title Squeezing Millimeter Waves through a Single, Nanometer-wide, Centimeter-long Slit
title_full Squeezing Millimeter Waves through a Single, Nanometer-wide, Centimeter-long Slit
title_fullStr Squeezing Millimeter Waves through a Single, Nanometer-wide, Centimeter-long Slit
title_full_unstemmed Squeezing Millimeter Waves through a Single, Nanometer-wide, Centimeter-long Slit
title_short Squeezing Millimeter Waves through a Single, Nanometer-wide, Centimeter-long Slit
title_sort squeezing millimeter waves through a single, nanometer-wide, centimeter-long slit
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4208056/
https://www.ncbi.nlm.nih.gov/pubmed/25342288
http://dx.doi.org/10.1038/srep06722
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