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Proceedings Paper

Near-field optical properties of Au-Nanocubes: confinement of hot and cold spots
Author(s): M. Haggui; M. Dridi; J. Plain; S. Marguet; H. Perez; G. C. Schatz; G. P. Wiederrecht; S. K. Gray; R. Bachelot
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Paper 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.

Paper Details

Date Published: 1 May 2012
PDF: 10 pages
Proc. SPIE 8424, Nanophotonics IV, 842415 (1 May 2012); doi: 10.1117/12.922414
Show Author Affiliations
M. Haggui, Lab. de Nanotechnologie et d'Instrumentation Optique, CNRS, Univ. de Technologie Troyes (France)
M. Dridi, Northwestern Univ. (United States)
J. Plain, Lab. de Nanotechnologie et d'Instrumentation Optique, CNRS, Univ. de Technologie Troyes (France)
S. Marguet, Commissariat à l'Énergie Atomique (France)
H. Perez, Commissariat à l'Énergie Atomique (France)
G. C. Schatz, Northwestern Univ. (United States)
G. P. Wiederrecht, Argonne National Lab. (United States)
S. K. Gray, Argonne National Lab. (United States)
R. Bachelot, Lab. de Nanotechnologie et d'Instrumentation Optique, CNRS, Univ. de Technologie Troyes (France)


Published in SPIE Proceedings Vol. 8424:
Nanophotonics IV
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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