Apertureless near-field optical microscopy: Differences between heterodyne interferometric and non-interferometric images
We analyze simulations of the image generation process in apertureless Scanning Near-Field Optical Microscopy to study the differences between heterodyne interferometric and non-interferometric detection schemes implemented in experiments. Beyond the well-known possibilities of interferometry to enhance signals and extract optical phase information, we find that heterodyne interferometric detection may in fact lead to more robust and easier to interpret experimental results. Further, our results illustrate how simulations that do not include the use of interferometric detection in a given experiment can lead to significant disagreements with the measurements. (C) 2011 Elsevier B.V. All rights reserved.
Keywords: Apertureless near-field optical microscopy ; Interferometry ; Demodulation ; Simulations ; Imaging ; Dielectric Contrast ; Gold Nanoparticles ; Scattering ; Resolution ; Simulations ; Constants ; Substrate ; Signals ; Surface ; Sample
Record created on 2012-06-25, modified on 2016-08-09