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

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.
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Submitted on : Tuesday, September 10, 2019 - 5:38:03 PM
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Dominique Barchiesi, Thomas Grosges, Alexandre Vial. Measurement of decay lengths of evanescent waves: the lock-in nonlinear filtering. New Journal of Physics, Institute of Physics: Open Access Journals, 2006, 8 (11), pp.263-263. ⟨10.1088/1367-2630/8/11/263⟩. ⟨hal-02283394⟩

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