Measurement of decay lengths of evanescent waves: the lock-in nonlinear filtering

Details Measurement of decay lengths of evanescent waves: the lock-in nonlinear filtering Measurement of decay lengths of evanescent waves: the lock-in nonlinear filtering

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006njph....8..263b&link_type=abstract

New Journal of Physics, Volume 8, Issue 11, pp. 263 (2006).

Physics

2

Scientific paper

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.

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