Free-standing optical gold bowtie nanoantenna with variable gap size for enhanced Raman spectroscopy

Nahla A. Hatab; Chun Hway Hsueh; Abigail L. Gaddis; Scott T. Retterer; Jia Han Li; Gyula Eres; Zhenyu Zhang; Baohua Gu

doi:10.1021/nl102963g

Free-standing optical gold bowtie nanoantenna with variable gap size for enhanced Raman spectroscopy

Nahla A. Hatab
, Chun Hway Hsueh
, Abigail L. Gaddis
, Scott T. Retterer
, Jia Han Li
, Gyula Eres
, Zhenyu Zhang
, Baohua Gu

Research output: Contribution to journal › Article › peer-review

520 Scopus citations

Abstract

We describe plasmonic interactions in suspended gold bowtie nanoantenna leading to strong electromagnetic field (E) enhancements. Surface-enhanced Raman scattering (SERS) was used to demonstrate the performance of the nanoantenna. In addition to the well-known gap size dependence, up to 2 orders of magnitude additional enhancement is observed with elevated bowties. The overall behavior is described by a SERS enhancement factor exceeding 10¹¹ along with an anomalously weak power law dependence of E on the gap size in a range from 8 to 50 nm that is attributed to a plasmonic nanocavity effect occurring when the plasmonic interactions enter a strongly coupled regime.

Original language	English
Pages (from-to)	4952-4955
Number of pages	4
Journal	Nano Letters
Volume	10
Issue number	12
DOIs	https://doi.org/10.1021/nl102963g
State	Published - Dec 8 2010

Keywords

Electron beam lithography
FDTD simulation
collective photonic effect
optical nanoantenna
single molecule SERS

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10.1021/nl102963g

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title = "Free-standing optical gold bowtie nanoantenna with variable gap size for enhanced Raman spectroscopy",

abstract = "We describe plasmonic interactions in suspended gold bowtie nanoantenna leading to strong electromagnetic field (E) enhancements. Surface-enhanced Raman scattering (SERS) was used to demonstrate the performance of the nanoantenna. In addition to the well-known gap size dependence, up to 2 orders of magnitude additional enhancement is observed with elevated bowties. The overall behavior is described by a SERS enhancement factor exceeding 1011 along with an anomalously weak power law dependence of E on the gap size in a range from 8 to 50 nm that is attributed to a plasmonic nanocavity effect occurring when the plasmonic interactions enter a strongly coupled regime.",

keywords = "Electron beam lithography, FDTD simulation, collective photonic effect, optical nanoantenna, single molecule SERS",

author = "Hatab, \{Nahla A.\} and Hsueh, \{Chun Hway\} and Gaddis, \{Abigail L.\} and Retterer, \{Scott T.\} and Li, \{Jia Han\} and Gyula Eres and Zhenyu Zhang and Baohua Gu",

year = "2010",

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doi = "10.1021/nl102963g",

language = "English",

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TY - JOUR

T1 - Free-standing optical gold bowtie nanoantenna with variable gap size for enhanced Raman spectroscopy

AU - Hatab, Nahla A.

AU - Hsueh, Chun Hway

AU - Gaddis, Abigail L.

AU - Retterer, Scott T.

AU - Li, Jia Han

AU - Eres, Gyula

AU - Zhang, Zhenyu

AU - Gu, Baohua

PY - 2010/12/8

Y1 - 2010/12/8

N2 - We describe plasmonic interactions in suspended gold bowtie nanoantenna leading to strong electromagnetic field (E) enhancements. Surface-enhanced Raman scattering (SERS) was used to demonstrate the performance of the nanoantenna. In addition to the well-known gap size dependence, up to 2 orders of magnitude additional enhancement is observed with elevated bowties. The overall behavior is described by a SERS enhancement factor exceeding 1011 along with an anomalously weak power law dependence of E on the gap size in a range from 8 to 50 nm that is attributed to a plasmonic nanocavity effect occurring when the plasmonic interactions enter a strongly coupled regime.

AB - We describe plasmonic interactions in suspended gold bowtie nanoantenna leading to strong electromagnetic field (E) enhancements. Surface-enhanced Raman scattering (SERS) was used to demonstrate the performance of the nanoantenna. In addition to the well-known gap size dependence, up to 2 orders of magnitude additional enhancement is observed with elevated bowties. The overall behavior is described by a SERS enhancement factor exceeding 1011 along with an anomalously weak power law dependence of E on the gap size in a range from 8 to 50 nm that is attributed to a plasmonic nanocavity effect occurring when the plasmonic interactions enter a strongly coupled regime.

KW - Electron beam lithography

KW - FDTD simulation

KW - collective photonic effect

KW - optical nanoantenna

KW - single molecule SERS

UR - https://www.scopus.com/pages/publications/78650083661

U2 - 10.1021/nl102963g

DO - 10.1021/nl102963g

M3 - Article

AN - SCOPUS:78650083661

SN - 1530-6984

VL - 10

SP - 4952

EP - 4955

JO - Nano Letters

JF - Nano Letters

IS - 12

ER -

Free-standing optical gold bowtie nanoantenna with variable gap size for enhanced Raman spectroscopy

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Keywords

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