scholarly journals Antenna-mediated back-scattering efficiency in infrared near-field microscopy

2008 ◽  
Vol 16 (15) ◽  
pp. 11203 ◽  
Author(s):  
M. Brehm ◽  
A. Schliesser ◽  
F. Čajko ◽  
I. Tsukerman ◽  
F. Keilmann
Keyword(s):  
Near Field ◽  
Scattering Efficiency ◽  
Back Scattering

Contrast and scattering efficiency of scattering-type near-field optical probes

2004 ◽  
Vol 85 (19) ◽  
pp. 4466 ◽  
Author(s):  
D. Haefliger ◽  
J. M. Plitzko ◽  
R. Hillenbrand
Keyword(s):  
Near Field ◽  
Optical Probes ◽  
Scattering Efficiency

scholarly journals Scattering efficiency and near field enhancement of active semiconductor plasmonic antennas at terahertz frequencies

2010 ◽  
Vol 18 (3) ◽  
pp. 2797 ◽  
Author(s):  
Vincenzo Giannini ◽  
Audrey Berrier ◽  
Stefan A. Maier ◽  
José Antonio Sánchez-Gil ◽  
Jaime Gómez Rivas
Keyword(s):  
Near Field ◽  
Field Enhancement ◽  
Scattering Efficiency ◽  
Terahertz Frequencies

scholarly journals Optical properties of the scales of Morpho rhetenor butterflies: theoretical and experimental investigation of the back-scattering of light in the visible spectrum

2004 ◽  
Vol 1 (1) ◽  
pp. 49-59 ◽  
Author(s):  
Luca Plattner
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Specular Reflection ◽  
Spectral Response ◽  
Scattered Light ◽  
Near Field ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Geometrical Features ◽  
Back Scattering

A study of the optical properties of the largely periodic microstructure occurring on the wings of the iridescent tropical butterfly Morpho rhetenor and responsible for its structural colouration is reported. An extensive measurement of the back-scattering of visible light from butterfly scales was performed for various angles of incidence. Efficient low-pass filter behaviour was observed for all angles of incidence and polarizations, with near-complete transmission at wavelengths above the threshold of 550 nm. The angular spread of the back-scattered light was found to be organized in lobes with total extinction of the specular reflection for all conditions of incidence. Retro-reflector behaviour was also observed for angles of incidence of 30° and above. Additionally, the role of periodic geometrical features found in the microstructure for the generation of its spectral response was analysed theoretically. Using finite-difference timedomain and near-field to far-field transformation techniques, the back-scattering of visible light by models was computed numerically and the relevance of geometrical features for the production of structural colour and diffraction was demonstrated.

Near-field scanning optical microscopy

1986 ◽  
Vol 44 ◽  
pp. 642-643
Author(s):  
E. Betzig ◽  
A. Harootunian ◽  
M. Isaacson ◽  
A. Lewis
Keyword(s):  
Near Field ◽  
Optical Microscope ◽  
Visible Radiation ◽  
Field Methods ◽  
Optical Elements ◽  
Optical Region ◽  
Order Of Magnitude ◽  
Nondestructive Imaging ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

In general, conventional methods of optical imaging are limited in spatial resolution by either the wavelength of the radiation used or by the aberrations of the optical elements. This is true whether one uses a scanning probe or a fixed beam method. The reason for the wavelength limit of resolution is due to the far field methods of producing or detecting the radiation. If one resorts to restricting our probes to the near field optical region, then the possibility exists of obtaining spatial resolutions more than an order of magnitude smaller than the optical wavelength of the radiation used. In this paper, we will describe the principles underlying such "near field" imaging and present some preliminary results from a near field scanning optical microscope (NS0M) that uses visible radiation and is capable of resolutions comparable to an SEM. The advantage of such a technique is the possibility of completely nondestructive imaging in air at spatial resolutions of about 50nm.

Principles of Planar Near-Field Antenna Measurements

2007 ◽  
Author(s):  
Stuart Gregson ◽  
John McCormick ◽  
Clive Parini
Keyword(s):  
Near Field ◽  
Antenna Measurements

Immobilization of Radionuclides on Iron Canister Material at Simulated Near-field Conditions

2008 ◽  
Author(s):  
Daqing Cui ◽  
Ylva Ranebo ◽  
Jeanett Low ◽  
Vincenzo Rondinella ◽  
Jinshan Pan ◽  
...  
Keyword(s):  
Near Field ◽  
Field Conditions
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