scholarly journals Waveguide mode imaging and dispersion analysis with terahertz near-field microscopy

2009 ◽  
Vol 94 (17) ◽  
pp. 171104 ◽  
Author(s):  
Oleg Mitrofanov ◽  
Thomas Tan ◽  
Paul R. Mark ◽  
Bradley Bowden ◽  
James A. Harrington
Keyword(s):  
Waveguide Mode ◽  
Near Field ◽  
Dispersion Analysis

scholarly journals Optimization of a waveguide-mode sensing chip for an ultraviolet near-field illumination biosensor

2017 ◽  
Vol 25 (21) ◽  
pp. 26011 ◽  
Author(s):  
Chiaki Kuroda ◽  
Yoshimichi Ohki ◽  
Makoto Fujimaki
Keyword(s):  
Waveguide Mode ◽  
Near Field

scholarly journals Development of a TiO2/SiO2 waveguide-mode chip for an ultraviolet near-field fluorescence sensor

2018 ◽  
Vol 26 (6) ◽  
pp. 6796 ◽  
Author(s):  
Chiaki Kuroda ◽  
Midori Nakai ◽  
Makoto Fujimaki ◽  
Yoshimichi Ohki
Keyword(s):  
Waveguide Mode ◽  
Near Field ◽  
Fluorescence Sensor

scholarly journals Partitioning evapotranspiration using stable isotopes and Lagrangian dispersion analysis in a small agricultural catchment

2020 ◽  
Vol 68 (2) ◽  
pp. 134-143
Author(s):  
Patrick Hogan ◽  
Juraj Parajka ◽  
Lee Heng ◽  
Peter Strauss ◽  
Günter Blöschl
Keyword(s):  
Stable Isotope ◽  
Eddy Covariance ◽  
Isotopic Ratio ◽  
Near Field ◽  
Field Measurements ◽  
Dispersion Analysis ◽  
Average Value ◽  
Turbulent Statistics ◽  
Isotope Technique ◽  
Lagrangian Dispersion

AbstractMeasuring evaporation and transpiration at the field scale is complicated due to the heterogeneity of the environment, with point measurements requiring upscaling and field measurements such as eddy covariance measuring only the evapotranspiration. During the summer of 2014 an eddy covariance device was used to measure the evapotranspiration of a growing maize field at the HOAL catchment. The stable isotope technique and a Lagrangian near field theory (LNF) were then utilized to partition the evapotranspiration into evaporation and transpiration, using the concentration and isotopic ratio of water vapour within the canopy. The stable isotope estimates of the daily averages of the fraction of evapotranspiration (Ft) ranged from 43.0–88.5%, with an average value of 67.5%, while with the LNF method, Ft was found to range from 52.3–91.5% with an average value of 73.5%. Two different parameterizations for the turbulent statistics were used, with both giving similar R2 values, 0.65 and 0.63 for the Raupach and Leuning parameterizations, with the Raupach version performing slightly better. The stable isotope method demonstrated itself to be a more robust method, returning larger amounts of useable data, however this is limited by the requirement of much more additional data.

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
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