Near-field optical properties of Au-nanocubes: Confinement of hot and cold spots

M. Haggui; M. Dridi; J. Plain; S. Marguet; H. Perez; George C Schatz; G. P. Wiederrecht; S. K. Gray; R. Bachelot

doi:10.1117/12.922414

Near-field optical properties of Au-nanocubes: Confinement of hot and cold spots

M. Haggui^*, M. Dridi, J. Plain, S. Marguet, H. Perez, George C Schatz, G. P. Wiederrecht, S. K. Gray, R. Bachelot

^*Corresponding author for this work

Chemistry

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We studied the near-field optical properties of colloidal gold nanocubes (GNCs) using a photochemical imaging method. This method is based on the vectorial molecular displacements, of photosensitive azo-dyes, which are sensitive to the polarization of the optical near-field of the GNCs. We analyzed the spatial confinement of both electromagnetic hot and "cold" spots with a spatial resolution up to 15nm (λ/35). The new concept of cold spot presents valuable and complementary electromagnetic information to the well known electromagnetic hot spot. We demonstrated that cold spots are highly sensitive to polarization and can be much more confined than hot spots enabling them to be applied in high resolution imaging and spectroscopy.

Original language	English (US)
Title of host publication	Nanophotonics IV
Volume	8424
DOIs	https://doi.org/10.1117/12.922414
State	Published - Jul 11 2012
Event	Nanophotonics IV - Brussels, Belgium Duration: Apr 15 2012 → Apr 19 2012

Other

Other	Nanophotonics IV
Country/Territory	Belgium
City	Brussels
Period	4/15/12 → 4/19/12

Keywords

Near-field imaging
Plasmonics
cold spots
hot spots
photoisomerization

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.922414

Cite this

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title = "Near-field optical properties of Au-nanocubes: Confinement of hot and cold spots",

abstract = "We studied the near-field optical properties of colloidal gold nanocubes (GNCs) using a photochemical imaging method. This method is based on the vectorial molecular displacements, of photosensitive azo-dyes, which are sensitive to the polarization of the optical near-field of the GNCs. We analyzed the spatial confinement of both electromagnetic hot and {"}cold{"} spots with a spatial resolution up to 15nm (λ/35). The new concept of cold spot presents valuable and complementary electromagnetic information to the well known electromagnetic hot spot. We demonstrated that cold spots are highly sensitive to polarization and can be much more confined than hot spots enabling them to be applied in high resolution imaging and spectroscopy.",

keywords = "Near-field imaging, Plasmonics, cold spots, hot spots, photoisomerization",

author = "M. Haggui and M. Dridi and J. Plain and S. Marguet and H. Perez and Schatz, {George C} and Wiederrecht, {G. P.} and Gray, {S. K.} and R. Bachelot",

year = "2012",

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day = "11",

doi = "10.1117/12.922414",

language = "English (US)",

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T2 - Nanophotonics IV

AU - Haggui, M.

AU - Dridi, M.

AU - Plain, J.

AU - Marguet, S.

AU - Perez, H.

AU - Schatz, George C

AU - Wiederrecht, G. P.

AU - Gray, S. K.

AU - Bachelot, R.

PY - 2012/7/11

Y1 - 2012/7/11

N2 - We studied the near-field optical properties of colloidal gold nanocubes (GNCs) using a photochemical imaging method. This method is based on the vectorial molecular displacements, of photosensitive azo-dyes, which are sensitive to the polarization of the optical near-field of the GNCs. We analyzed the spatial confinement of both electromagnetic hot and "cold" spots with a spatial resolution up to 15nm (λ/35). The new concept of cold spot presents valuable and complementary electromagnetic information to the well known electromagnetic hot spot. We demonstrated that cold spots are highly sensitive to polarization and can be much more confined than hot spots enabling them to be applied in high resolution imaging and spectroscopy.

AB - We studied the near-field optical properties of colloidal gold nanocubes (GNCs) using a photochemical imaging method. This method is based on the vectorial molecular displacements, of photosensitive azo-dyes, which are sensitive to the polarization of the optical near-field of the GNCs. We analyzed the spatial confinement of both electromagnetic hot and "cold" spots with a spatial resolution up to 15nm (λ/35). The new concept of cold spot presents valuable and complementary electromagnetic information to the well known electromagnetic hot spot. We demonstrated that cold spots are highly sensitive to polarization and can be much more confined than hot spots enabling them to be applied in high resolution imaging and spectroscopy.

KW - Near-field imaging

KW - Plasmonics

KW - cold spots

KW - hot spots

KW - photoisomerization

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DO - 10.1117/12.922414

M3 - Conference contribution

AN - SCOPUS:84863541930

SN - 9780819491169

VL - 8424

BT - Nanophotonics IV

Y2 - 15 April 2012 through 19 April 2012

ER -

Near-field optical properties of Au-nanocubes: Confinement of hot and cold spots

Abstract

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Keywords

ASJC Scopus subject areas

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