A new approach for near-field synthesis

2015 ◽  
Author(s):  
Sebastien Clauzier ◽  
Said M. Mikki ◽  
Yahia M. M. Antar
Keyword(s):  
Near Field ◽  
New Approach

scholarly journals Controlling the near-field excitation of nano-antennas with phase-change materials

2013 ◽  
Vol 4 ◽  
pp. 632-637 ◽  
Author(s):  
Tsung Sheng Kao ◽  
Yi Guo Chen ◽  
Ming Hui Hong
Keyword(s):  
Thin Layer ◽  
Phase Change ◽  
Hot Spots ◽  
Phase Change Materials ◽  
Near Field ◽  
Plasmon Coupling ◽  
New Approach ◽  
Field Excitation ◽  
Bio Assay ◽  
Nano Antennas

By utilizing the strongly induced plasmon coupling between discrete nano-antennas and quantitatively controlling the crystalline proportions of an underlying Ge2Sb2Te5 (GST) phase-change thin layer, we show that nanoscale light localizations in the immediate proximity of plasmonic nano-antennas can be spatially positioned. Isolated energy hot-spots at a subwavelength scale can be created and adjusted across the landscape of the plasmonic system at a step resolution of λ/20. These findings introduce a new approach for nano-circuitry, bio-assay addressing and imaging applications.

scholarly journals Analysis of Arbitrary Reflector Antennas Applying the Geometrical Theory of Diffraction Together with the Master Points Technique

2013 ◽  
Vol 2013 ◽  
pp. 1-13
Author(s):  
María Jesús Algar ◽  
Jose-Ramón Almagro ◽  
Javier Moreno ◽  
Lorena Lozano ◽  
Felipe Cátedra
Keyword(s):  
Method Of Moments ◽  
Near Field ◽  
Complex Geometries ◽  
Geometrical Theory ◽  
Reflector Antennas ◽  
New Approach ◽  
Sampling Points ◽  
Time Requirements ◽  
Geometrical Theory Of Diffraction ◽  
A New Technique

An efficient approach for the analysis of surface conformed reflector antennas fed arbitrarily is presented. The near field in a large number of sampling points in the aperture of the reflector is obtained applying the Geometrical Theory of Diffraction (GTD). A new technique named Master Points has been developed to reduce the complexity of the ray-tracing computations. The combination of both GTD and Master Points reduces the time requirements of this kind of analysis. To validate the new approach, several reflectors and the effects on the radiation pattern caused by shifting the feed and introducing different obstacles have been considered concerning both simple and complex geometries. The results of these analyses have been compared with the Method of Moments (MoM) results.

A New Approach to Terahertz Local Spectroscopy Using Microfabricated Scanning Near-Field Probe

2008 ◽  
Vol 47 (10) ◽  
pp. 8095-8097 ◽  
Author(s):  
Kentaro Iwami ◽  
Takahito Ono ◽  
Masayoshi Esashi
Keyword(s):  
Near Field ◽  
New Approach

Plasmon Printing – a New Approach to Near-Field Lithography

2001 ◽  
Vol 705 ◽  
Author(s):  
Pieter G. Kik ◽  
Stefan A. Maier ◽  
Harry A. Atwater
Keyword(s):  
Near Field ◽  
Field Enhancement ◽  
Diffraction Limit ◽  
Metal Nanostructures ◽  
Local Field Enhancement ◽  
New Approach ◽  
Broad Beam ◽  
Close Proximity ◽  
Particle Shapes ◽  
Plasmon Resonance Frequency

AbstractWe propose a method for replicating patterns with a resolution well below the diffraction limit, using broad beam illumination and standard photoresist. In particular it is shown that visible exposure (λ=410 nm) of silver nanoparticles in close proximity to a thin film of g-line resist (AZ 1813) can produce selectively exposed areas with a diameter smaller than λ/20. The technique relies on the local field enhancement around metal nanostructures when illuminated at the surface plasmon resonance frequency. The method can be extended to various metals, photosensitive layers, and particle shapes.

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