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DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 201 | - |
dc.citation.startPage | 195 | - |
dc.citation.title | FARADAY DISCUSSIONS | - |
dc.citation.volume | 178 | - |
dc.contributor.author | Park, Hyeong‐Ryeol | - |
dc.contributor.author | Namgung, Seon | - |
dc.contributor.author | Chen, Xiaoshu | - |
dc.contributor.author | Oh, Sang-Hyun | - |
dc.date.accessioned | 2023-12-22T01:08:43Z | - |
dc.date.available | 2023-12-22T01:08:43Z | - |
dc.date.created | 2019-03-04 | - |
dc.date.issued | 2015-06 | - |
dc.description.abstract | We have investigated the extraordinary optical transmission of terahertz waves through an array of nanogaps with varying dimensions and periodicities, and used this platform to demonstrate terahertz sensing of a thin film of single-walled carbon nanotubes. We have used atomic layer lithography to fabricate periodic arrays of nanogap loops that have a gap size of 2 nm and a loop length of 100 mu m (aspect ratio of 50 000). These sub-mm-scale loops of nanogaps can sustain terahertz electromagnetic resonances along the contour. We have characterized the transmission of terahertz waves through the nanogap arrays and investigated the influence of inter-gap electromagnetic coupling as the array periodicity shrinks from 100 mm to 4 mm. While the gaps occupy only 0.1% of the surface area, we have measured an amplitude (vertical bar E vertical bar) transmittance of over 50% due to the strong and broadband field enhancement inside the nanogaps. The absolute transmission through the 2 nm gaps along the rectangular loops can be boosted up to 25%, while it is only 1% for annular gaps with the same perimeter. Furthermore, the extremely tight field confinement and strong field enhancement near the 2 nm gap lead to 43% extinction of THz waves in a 10 nm-thick film of single-walled carbon nanotubes over the gaps. On the other hand, THz extinction by the same nanotube film on a bare glass substrate is only 2%. These nanogaps pave the way toward developing sensitive terahertz detectors for biological and chemical targets. | - |
dc.identifier.bibliographicCitation | FARADAY DISCUSSIONS, v.178, pp.195 - 201 | - |
dc.identifier.doi | 10.1039/c4fd00233d | - |
dc.identifier.issn | 1359-6640 | - |
dc.identifier.scopusid | 2-s2.0-84930014120 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/26314 | - |
dc.identifier.url | https://pubs.rsc.org/en/Content/ArticleLanding/2015/FD/C4FD00233D#!divAbstract | - |
dc.identifier.wosid | 000354962300011 | - |
dc.language | 영어 | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | High-density metallic nanogap arrays for the sensitive detection of single-walled carbon nanotube thin films | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | EXTRAORDINARY TRANSMISSION | - |
dc.subject.keywordPlus | NONLINEAR PLASMONICS | - |
dc.subject.keywordPlus | FIELD ENHANCEMENT | - |
dc.subject.keywordPlus | LIGHT | - |
dc.subject.keywordPlus | QUANTUM | - |
dc.subject.keywordPlus | WAVES | - |
dc.subject.keywordPlus | ABSORPTION | - |
dc.subject.keywordPlus | APERTURES | - |
dc.subject.keywordPlus | MODULATOR | - |
dc.subject.keywordPlus | OPTICS | - |
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