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Adiabatic mode transformation in width-graded nano-gratings enabling multiwavelength light localization
We delineate the four principal surface plasmon polariton coupling and interaction mechanisms in subwavelength gratings, and demonstrate their significant roles in shaping the optical response of plasmonic gratings. Within the framework of width-graded metal–insulator-metal nano-gratings, electromag...
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| Published in: | Scientific reports 2021-01, Vol.11 (1), p.669-669, Article 669 |
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| creator | Shayegannia, Moein Montazeri, Arthur O. Dixon, Katelyn Prinja, Rajiv Kazemi-Zanjani, Nastaran Kherani, Nazir P. |
| description | We delineate the four principal surface plasmon polariton coupling and interaction mechanisms in subwavelength gratings, and demonstrate their significant roles in shaping the optical response of plasmonic gratings. Within the framework of width-graded metal–insulator-metal nano-gratings, electromagnetic field confinement and wave guiding result in multiwavelength light localization provided conditions of adiabatic mode transformation are satisfied. The field is enhanced further through fine tuning of the groove-width (
w
), groove-depth (
L
) and groove-to-groove-separation (
d
). By juxtaposing the resonance modes of width-graded and non-graded gratings and defining the adiabaticity condition, we demonstrate the criticality of
w
and
d
in achieving adiabatic mode transformation among the grooves. We observe that the resonant wavelength of a graded grating corresponds to the properties of a single groove when the grooves are adiabatically coupled. We show that
L
plays an important function in defining the span of localized wavelengths. Specifically, we show that multiwavelength resonant modes with intensity enhancement exceeding three orders of magnitude are possible with
w
|
| doi_str_mv | 10.1038/s41598-020-79815-9 |
| format | article |
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w
), groove-depth (
L
) and groove-to-groove-separation (
d
). By juxtaposing the resonance modes of width-graded and non-graded gratings and defining the adiabaticity condition, we demonstrate the criticality of
w
and
d
in achieving adiabatic mode transformation among the grooves. We observe that the resonant wavelength of a graded grating corresponds to the properties of a single groove when the grooves are adiabatically coupled. We show that
L
plays an important function in defining the span of localized wavelengths. Specifically, we show that multiwavelength resonant modes with intensity enhancement exceeding three orders of magnitude are possible with
w
< 30 nm and 300 nm <
d
< 900 nm for a range of fixed values of
L
. This study presents a novel paradigm of deep-subwavelength adiabatically-coupled width-graded gratings—illustrating its versatility in design, hence its viability for applications ranging from surface enhanced Raman spectroscopy to multispectral imaging.</description><identifier>ISSN: 2045-2322</identifier><identifier>EISSN: 2045-2322</identifier><identifier>DOI: 10.1038/s41598-020-79815-9</identifier><identifier>PMID: 33436800</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>639/166/987 ; 639/624/400/1021 ; 639/624/400/1102 ; 639/624/400/1103 ; 639/766/1130/2799 ; Adiabatic ; Electric fields ; Electromagnetic fields ; Electromagnetism ; Humanities and Social Sciences ; Light ; Localization ; Microscopy ; multidisciplinary ; Raman spectroscopy ; Science ; Science (multidisciplinary) ; Spectrum analysis ; Wavelengths</subject><ispartof>Scientific reports, 2021-01, Vol.11 (1), p.669-669, Article 669</ispartof><rights>The Author(s) 2021</rights><rights>The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c540t-aae263e2cd0859530e149803a2e895d5a8ddbfe6c56fbef7ad57ee8803a31a753</citedby><cites>FETCH-LOGICAL-c540t-aae263e2cd0859530e149803a2e895d5a8ddbfe6c56fbef7ad57ee8803a31a753</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.proquest.com/docview/2477093017/fulltextPDF?pq-origsite=primo$$EPDF$$P50$$Gproquest$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.proquest.com/docview/2477093017?pq-origsite=primo$$EHTML$$P50$$Gproquest$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,885,25753,27924,27925,37012,37013,44590,53791,53793,75126</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33436800$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Shayegannia, Moein</creatorcontrib><creatorcontrib>Montazeri, Arthur O.</creatorcontrib><creatorcontrib>Dixon, Katelyn</creatorcontrib><creatorcontrib>Prinja, Rajiv</creatorcontrib><creatorcontrib>Kazemi-Zanjani, Nastaran</creatorcontrib><creatorcontrib>Kherani, Nazir P.</creatorcontrib><title>Adiabatic mode transformation in width-graded nano-gratings enabling multiwavelength light localization</title><title>Scientific reports</title><addtitle>Sci Rep</addtitle><addtitle>Sci Rep</addtitle><description>We delineate the four principal surface plasmon polariton coupling and interaction mechanisms in subwavelength gratings, and demonstrate their significant roles in shaping the optical response of plasmonic gratings. Within the framework of width-graded metal–insulator-metal nano-gratings, electromagnetic field confinement and wave guiding result in multiwavelength light localization provided conditions of adiabatic mode transformation are satisfied. The field is enhanced further through fine tuning of the groove-width (
w
), groove-depth (
L
) and groove-to-groove-separation (
d
). By juxtaposing the resonance modes of width-graded and non-graded gratings and defining the adiabaticity condition, we demonstrate the criticality of
w
and
d
in achieving adiabatic mode transformation among the grooves. We observe that the resonant wavelength of a graded grating corresponds to the properties of a single groove when the grooves are adiabatically coupled. We show that
L
plays an important function in defining the span of localized wavelengths. Specifically, we show that multiwavelength resonant modes with intensity enhancement exceeding three orders of magnitude are possible with
w
< 30 nm and 300 nm <
d
< 900 nm for a range of fixed values of
L
. This study presents a novel paradigm of deep-subwavelength adiabatically-coupled width-graded gratings—illustrating its versatility in design, hence its viability for applications ranging from surface enhanced Raman spectroscopy to multispectral imaging.</description><subject>639/166/987</subject><subject>639/624/400/1021</subject><subject>639/624/400/1102</subject><subject>639/624/400/1103</subject><subject>639/766/1130/2799</subject><subject>Adiabatic</subject><subject>Electric fields</subject><subject>Electromagnetic fields</subject><subject>Electromagnetism</subject><subject>Humanities and Social Sciences</subject><subject>Light</subject><subject>Localization</subject><subject>Microscopy</subject><subject>multidisciplinary</subject><subject>Raman spectroscopy</subject><subject>Science</subject><subject>Science (multidisciplinary)</subject><subject>Spectrum analysis</subject><subject>Wavelengths</subject><issn>2045-2322</issn><issn>2045-2322</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>PIMPY</sourceid><sourceid>DOA</sourceid><recordid>eNp9kstu1TAQhiMEolXpC7BAkdiwSfElTuwNUlVxqVSJDaytSTzJ8ZFjFztpVZ4e56QtLQu88Wj8-_PM-C-Kt5ScUcLlx1RToWRFGKlaJamo1IvimJFaVIwz9vJJfFScprQneQmmaqpeF0ec17yRhBwX47mx0MFs-3IKBss5gk9DiFNOBV9aX95aM--qMYJBU3rwYY1n68dUoofO5aicFjfbW7hBh36cd6Wz424uXejB2d8H0pvi1QAu4en9flL8_PL5x8W36ur718uL86uqFzWZKwBkDUfWGyKFEpwgrZUkHBhKJYwAaUw3YNOLZuhwaMGIFlGuCk6hFfykuNy4JsBeX0c7QbzTAaw-JEIcNcTcrUMtxUCapmaspXkchnfDwETf1cBoo5CzzPq0sa6XbkLTo8_Tcc-gz0-83ekx3OhWkpqRNgM-3ANi-LVgmvVkU4_OgcewJM3qthX5G8la9_t_pPuwRJ9HdVARxQldgWxT9TGkFHF4LIYSvdpCb7bQ2Rb6YAut8qV3T9t4vPJggizgmyDlIz9i_Pv2f7B_AC45xM8</recordid><startdate>20210112</startdate><enddate>20210112</enddate><creator>Shayegannia, Moein</creator><creator>Montazeri, Arthur O.</creator><creator>Dixon, Katelyn</creator><creator>Prinja, Rajiv</creator><creator>Kazemi-Zanjani, Nastaran</creator><creator>Kherani, Nazir P.</creator><general>Nature Publishing Group UK</general><general>Nature Publishing Group</general><general>Nature Portfolio</general><scope>C6C</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X7</scope><scope>7XB</scope><scope>88A</scope><scope>88E</scope><scope>88I</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>LK8</scope><scope>M0S</scope><scope>M1P</scope><scope>M2P</scope><scope>M7P</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope><scope>7X8</scope><scope>5PM</scope><scope>DOA</scope></search><sort><creationdate>20210112</creationdate><title>Adiabatic mode transformation in width-graded nano-gratings enabling multiwavelength light localization</title><author>Shayegannia, Moein ; 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Within the framework of width-graded metal–insulator-metal nano-gratings, electromagnetic field confinement and wave guiding result in multiwavelength light localization provided conditions of adiabatic mode transformation are satisfied. The field is enhanced further through fine tuning of the groove-width (
w
), groove-depth (
L
) and groove-to-groove-separation (
d
). By juxtaposing the resonance modes of width-graded and non-graded gratings and defining the adiabaticity condition, we demonstrate the criticality of
w
and
d
in achieving adiabatic mode transformation among the grooves. We observe that the resonant wavelength of a graded grating corresponds to the properties of a single groove when the grooves are adiabatically coupled. We show that
L
plays an important function in defining the span of localized wavelengths. Specifically, we show that multiwavelength resonant modes with intensity enhancement exceeding three orders of magnitude are possible with
w
< 30 nm and 300 nm <
d
< 900 nm for a range of fixed values of
L
. This study presents a novel paradigm of deep-subwavelength adiabatically-coupled width-graded gratings—illustrating its versatility in design, hence its viability for applications ranging from surface enhanced Raman spectroscopy to multispectral imaging.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>33436800</pmid><doi>10.1038/s41598-020-79815-9</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | 639/166/987 639/624/400/1021 639/624/400/1102 639/624/400/1103 639/766/1130/2799 Adiabatic Electric fields Electromagnetic fields Electromagnetism Humanities and Social Sciences Light Localization Microscopy multidisciplinary Raman spectroscopy Science Science (multidisciplinary) Spectrum analysis Wavelengths |
| title | Adiabatic mode transformation in width-graded nano-gratings enabling multiwavelength light localization |
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