Authors
Dominique Barchiesi, Thomas Grosges, Alexandre Vial,
Title
Measurement of decay lengths of evanescent waves: the lock-in non linear filtering
In
New Journal of Physics
Volume
8
Issue
263
Pages
1–10
Year
2006
Publisher's URL
http://stacks.iop.org/1367-2630/8/263
Indexed by
Abstract
We study the influence of the lock-in amplifier and probe vibration on the measurement of decay lengths of evanescent waves after reconstruction of the Scanning Near-field Optical Microscopy signal. Thanks to the reconstruction which gives a tomography-like 3D map of the detected signal, the vertical decay lengths can be measured directly, from only one lateral scan. A nonlinear fit is applied to recover the exponential decays in simulated signals and experimental data.
Affiliations
Offprint