The objective of this study is to model a polarization modulation scanning near-field optical microscope set-up (PM-SNOM) and demonstrate how the influence of real instruments as photodetector and lock-in produces a coupling between signals that generates intrinsic artefacts on experimental data. A simple polar coordinates mathematical framework has been used to derive an analytical expression of the relevant signals. A simulation of typical experimental cases is presented and contrast artefacts more than 100% are demonstrated. This study is effective for an accurate analysis of PM-SNOM tests and it is of general use for the discussion of artefacts in polarization modulation systems.
|Autori interni:||ALLEGRINI, MARIA|
|Autori:||Micheletto R; Allegrini M; Kawakami Y|
|Titolo:||Artefacts in polarization modulation scanning near-field optical microscopes|
|Anno del prodotto:||2007|
|Digital Object Identifier (DOI):||10.1088/1464-4258/9/5/001|
|Appare nelle tipologie:||1.1 Articolo in rivista|