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dc.contributor.author
Chen, Xiaoshu
dc.contributor.author
Lindquist, Nathan C.
dc.contributor.author
Klemme, Daniel J.
dc.contributor.author
Nagpal, Prashant
dc.contributor.author
Norris, David J.
dc.contributor.author
Oh, Sang-Hyun
dc.date.accessioned
2022-08-24T09:33:38Z
dc.date.available
2017-06-12T17:56:11Z
dc.date.available
2022-08-24T09:33:38Z
dc.date.issued
2016-12-14
dc.identifier.issn
1530-6984
dc.identifier.issn
1530-6992
dc.identifier.other
10.1021/acs.nanolett.6b04113
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/125039
dc.identifier.doi
10.3929/ethz-b-000125039
dc.description.abstract
We present a novel plasmonic antenna structure, a split-wedge antenna, created by splitting an ultrasharp metallic wedge with a nanogap perpendicular to its apex. The nanogap can tightly confine gap plasmons and boost the local optical field intensity in and around these opposing metallic wedge tips. This three-dimensional split-wedge antenna integrates the key features of nanogaps and sharp tips, i.e., tight field confinement and three-dimensional nanofocusing, respectively, into a single platform. We fabricate split-wedge antennas with gaps that are as small as 1 nm in width at the wafer scale by combining silicon V-grooves with template stripping and atomic layer lithography. Computer simulations show that the field enhancement and confinement are stronger at the tip–gap interface compared to what standalone tips or nanogaps produce, with electric field amplitude enhancement factors exceeding 50 when near-infrared light is focused on the tip–gap geometry. The resulting nanometric hotspot volume is on the order of λ3/106. Experimentally, Raman enhancement factors exceeding 107 are observed from a 2 nm gap split-wedge antenna, demonstrating its potential for sensing and spectroscopy applications.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
Optical antenna
en_US
dc.subject
Surface-enhanced Raman scattering (SERS)
en_US
dc.subject
Template stripping
en_US
dc.subject
Gap plasmon
en_US
dc.subject
Atomic layer deposition
en_US
dc.subject
Atomic layer lithography
en_US
dc.title
Split-Wedge Antennas with Sub-5 nm Gaps for Plasmonic Nanofocusing
en_US
dc.type
Journal Article
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2016-11-22
ethz.journal.title
Nano Letters
ethz.journal.volume
16
en_US
ethz.journal.issue
12
en_US
ethz.journal.abbreviated
Nano Lett
ethz.pages.start
7849
en_US
ethz.pages.end
7856
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02668 - Inst. f. Energie- und Verfahrenstechnik / Inst. Energy and Process Engineering::03875 - Norris, David J. / Norris, David J.
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02668 - Inst. f. Energie- und Verfahrenstechnik / Inst. Energy and Process Engineering::03875 - Norris, David J. / Norris, David J.
ethz.date.deposited
2017-06-12T17:56:53Z
ethz.source
ECIT
ethz.identifier.importid
imp5936550912d3f79675
ethz.ecitpid
pub:187604
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-12T22:35:58Z
ethz.rosetta.lastUpdated
2021-02-14T14:50:58Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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