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Plasmon tuning and local field enhancement maximization of the nanocrescent
Nanotechnology, 2008We present a systematic numerical study of plasmon resonance of the nanocrescent. We show that by varying the nanocrescent geometry, the plasmon resonance peak can be tuned into the near-infrared and local field enhancement can be increased significantly, with maximum enhancement of the electric field amplitude of approximately 100 for realistic ...
Benjamin M, Ross, Luke P, Lee
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Local field enhancement with an apertureless near-field-microscope probe
Optics Communications, 1998Computer-simulated results of an electromagnetic field near the apex of a metallic probe of an apertureless near-field scanning optical microscope are shown under some different conditions. The results indicate that the metallic probe amplifies the electromagnetic field locally under the probe apex with an extent of apex size. The results were obtained
Hiromitsu Furukawa, Satoshi Kawata
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Localized field enhancement at metallic subwavelength structures
Optik, 2013Abstract The near field intensity distribution and the near-field transmission spectrums of metallic nanostructures simulated by the finite-difference time-domain method are present in the text. Better field intensity localization and larger field intensity enhancement exist in the near field intensity distribution images for nanoparticle array in ...
Jiang-Yan Li, Hai-qiang Ma
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Near-Field Enhancement Localization on Plasmonic Gratings
The Journal of Physical Chemistry C, 2016Plasmonic properties of arrays of gold nanodisks were investigated to study the localization of the near-field enhancement at the surface of the nanodisks. To measure the near field, surface-enhanced Raman spectroscopy (SERS) was performed on different kinds of substrates with and without an over layer of silica that disabled the possibility for our ...
Gillibert, Raymond +5 more
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Local Field Enhancement of Pillar Nanosurfaces for SERS
The Journal of Physical Chemistry C, 2010We present studies on the analysis and characterization of a unique nanosurface used for Surface-Enhanced Raman Spectroscopy. The optical properties of a nanostructure composed of dielectric pillars that support plasmonic nanoparticles have been investigated. A theoretical analysis has been performed to determine the structural properties that localize
POLEMI, Alessia +4 more
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Direct observation of locally enhanced electromagnetic field
Physica B: Condensed Matter, 2000Abstract Surface enhanced Raman scattering and other nonlinear enhanced optical effects are well known to be induced by the surface of discontinuous or rough metal thin films. In the percolating range of concentration, theoretical calculations lead to locally enhanced field distributions at the surface of the films, due to huge fluctuations close to ...
Patrice Gadenne +7 more
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Optical antennas: Resonators for local field enhancement
Journal of Applied Physics, 2003Electromagnetic field enhancement in optical antenna arrays is studied by simulation and experiment at midinfrared wavelengths. The optical antennas are designed to produce intense optical fields confined to subwavelength spatial dimensions when illuminated at the resonant wavelength.
K. B. Crozier +3 more
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Enhancement of local electric field in an electrorheological system
Applied Physics Letters, 2004A local electric field distribution in the midplane between two spherical metal particles under an applied electric field is measured for comparison with the real electrorheological system. It was found that the ratio of the maximum value of local electric field to applied electric field is not a constant as most theoretical models predicted.
H. Jie +7 more
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Surface Plasmon as a Probe of Local Field Enhancement
Plasmonics, 2009New method of experimental determination of local field enhancement at metal nanoparticles is suggested. It uses surface plasmon as a probe. Alternating-sign shift of surface plasmon resonance in copper nanoparticles incorporated in silica matrix has been observed under irradiation by intense femtosecond laser pulse.
Igor Dmitruk +7 more
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Near-field optical apertured tip and modified structures for local field enhancement
Applied Optics, 2001We present experimental measurements and simulation of the spatial distribution of near-field light at the aperture of a Si micromachined near-field scanning optical microscopy (NSOM) probe. A miniature aperture at the apex of a SiO(2) tip on a Si cantilever was fabricated with the low temperature oxidation and selective etching technique.
P N, Minh, T, Ono, S, Tanaka, M, Esashi
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