The oblate spheroid as near-field scanning surface for far-field reconstruction

2006 ◽  
Author(s):  
F. Ferrara ◽  
C. Gennarelli ◽  
G. Riccio ◽  
C. Savarese
Keyword(s):  
Near Field ◽  
Oblate Spheroid ◽  
Far Field ◽  
Field Reconstruction ◽  
Near Field Scanning

Antenna Far Field Reconstruction by a Minimum Near Field Measurements

1984 ◽  
Author(s):  
G. D'Elia ◽  
G. Leone ◽  
R. Pierri ◽  
G. Schirinzi
Keyword(s):  
Near Field ◽  
Field Measurements ◽  
Far Field ◽  
Field Reconstruction

Far-Field Prediction Using Only Magnetic Near-Field Scanning for EMI Test

2014 ◽  
Vol 56 (6) ◽  
pp. 1335-1343 ◽  
Author(s):  
Xu Gao ◽  
Jun Fan ◽  
Yaojiang Zhang ◽  
Hamed Kajbaf ◽  
David Pommerenke
Keyword(s):  
Near Field ◽  
Far Field ◽  
Near Field Scanning

Near-field scanning optical microscopy local luminescence studies of rhodamine dye

Open Physics ◽  
2010 ◽  
Vol 8 (3) ◽  
Author(s):  
Petr Klapetek ◽  
Juraj Bujdák ◽  
Jiří Buršík
Keyword(s):  
Time Domain ◽  
Near Field ◽  
Optical Microscope ◽  
Far Field ◽  
Luminescence Signal ◽  
Local Topography ◽  
Field Radiation ◽  
Scanning Optical Microscopy ◽  
Rhodamine Dye ◽  
Near Field Scanning

AbstractThis article presents results of near-field scanning optical microscope measurement of local luminescence of rhodamine 3B intercalated in montmorillonite samples. We focus on how local topography affects both the excitation and luminescence signals and resulting optical artifacts. The Finite Difference in Time Domain method (FDTD) is used to model the electromagnetic field distribution of the full tip-sample geometry including far-field radiation. Even complex problems like localized luminescence can be simulated computationally using FDTD and these simulations can be used to separate the luminescence signal from topographic artifacts.

Near-field microscopy of membrane domains

1995 ◽  
Vol 53 ◽  
pp. 778-779
Author(s):  
J. Hwang ◽  
E. Betzig ◽  
M. Edidin
Keyword(s):  
Cell Surface ◽  
Fluorescent Proteins ◽  
Near Field ◽  
Far Field ◽  
Membrane Domains ◽  
Fluorescent Cell ◽  
Optical Fiber Probe ◽  
Surface Fluorescence ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

Results from several different methods for probing the lateral organization of cell surface membranes indicate that these membranes are patchy, divided into domains. The data suggest that on average these domains are 0.1-1 μm across and that they persist for 10’s to 1000’s of seconds. At least some domains in this size range, when labeled by fluorescent proteins or lipids ought to be detectable by conventional, far-field, fluorescence microscopy. However, though some images are consistent with a domain structure for membranes, most far-field images of fluorescent cell surfaces lack the detail necessary to define domains.We have used near-field scanning optical microscopy, NSOM, of fluorescent-labeled cells to visualize membrane patchiness on the nanometer scale. This method yields images with resolutions of 50 nm or less. In our near-field microscope the labeled sample is illuminated by a optical fiber probe, with an aperture of 50-80nm. The probe is scanned over the cell surface at a distance of ˜ 10 nm from the surface. Only surface fluorescence is excited by the scanned probe.

Efficient far-field reconstruction of quasi-planar antennas from spherical spiral near-field data

2009 ◽  
Author(s):  
F. D'Agostino ◽  
F. Ferrara ◽  
C. Gennarelli ◽  
R. Guerriero ◽  
M. Migliozzi ◽  
...  
Keyword(s):  
Field Data ◽  
Near Field ◽  
Far Field ◽  
Planar Antennas ◽  
Field Reconstruction
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