scholarly journals Quantitative comparison of plasmon resonances and field enhancements of near-field optical antennae using FDTD simulations

2018 ◽  
Vol 26 (21) ◽  
pp. 27668 ◽  
Author(s):  
Richard J. Hermann ◽  
Michael J. Gordon
Keyword(s):  
Near Field ◽  
Quantitative Comparison ◽  
Plasmon Resonances ◽  
Fdtd Simulations ◽  
Field Enhancements

POLARIZATION-CONTROLLABLE WINGED NANOCONE TIP ANTENNA

2011 ◽  
Vol 20 (04) ◽  
pp. 415-425 ◽  
Author(s):  
MIKKO J. HUTTUNEN ◽  
JOUNI MÄKITALO ◽  
MARTTI KAURANEN
Keyword(s):  
Local Field ◽  
Near Field ◽  
Optical Antennas ◽  
Background Suppression ◽  
Far Field ◽  
Plasmon Resonances ◽  
Field Radiation ◽  
Efficient Coupling ◽  
Particle Plasmon ◽  
Field Enhancements

We propose winged metal nanocone optical antennas for efficient coupling of far-field radiation into the near-field of sharp metal tips. Unlike normal sharp metal tips, the winged nanocones require no oscillating field along the tip axis for the excitation of the tips. We calculate extinction spectra and local-field enhancements for single and winged gold nanocones and show that the field enhancements in the tips of the winged cones are due to a combination of particle plasmon resonances and a lightning-rod effect. We also propose that the winged nanocones could be used for optical far-field background suppression for tip-enhanced microscopy.

Tuning near-field enhancements on an off-resonance nanorod dimer via temporally shaped femtosecond laser

2015 ◽  
Vol 48 (43) ◽  
pp. 435102 ◽  
Author(s):  
Guangqing Du ◽  
Qing Yang ◽  
Feng Chen ◽  
Yu Lu ◽  
Yanmin Wu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Near Field ◽  
Nanorod Dimer ◽  
Field Enhancements

scholarly journals Lamb wave near field enhancements for surface breaking defects in plates

2012 ◽  
Vol 111 (10) ◽  
pp. 104906 ◽  
Author(s):  
A. R. Clough ◽  
R. S. Edwards
Keyword(s):  
Lamb Wave ◽  
Near Field ◽  
Field Enhancements

Localized Light Focusing and Super Resolution Readout via Chalcogenide Thin Film

2006 ◽  
Vol 918 ◽  
Author(s):  
Junji Tominaga ◽  
Paul Fons ◽  
Takayuki Shima ◽  
Kazuma Kurihara ◽  
Takashi Nakano ◽  
...  
Keyword(s):  
Finite Difference Time Domain ◽  
Near Field ◽  
Super Resolution ◽  
Spot Size ◽  
Optical Disc ◽  
Chalcogenide Film ◽  
Fdtd Simulations ◽  
Light Focusing ◽  
Difference Time ◽  
Chalcogenide Thin Film

AbstractWe have demonstrated that certain chalcogenide layers within a spinning super-RENS optical disc allow to squeeze the 650 nm laser beam to a spot size as fine as 50 nm using a 15-nm chalcogenide film. The near-field light was focused at a depth of just over 30 nm after passing through a chalcogenide film. Finite-difference time-domain (FDTD) simulations also reproduced these results. We suggest that a conductive ring aperture generated in the chalcogenide layers plays an important role in the localized light focusing.

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