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Related Concept Videos

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Related Experiment Video

Updated: Jun 8, 2025

Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments
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Reflectance mapping with microsphere-assisted white light interference nanoscopy.

Sébastien Marbach1, Rémy Claveau2, Paul Montgomery2

  • 1ICube, Université de Strasbourg, CNRS, INSA, 67000, Strasbourg, France. sebastien.marbach@etu.unistra.fr.

Scientific Reports
|November 6, 2024
PubMed
Summary
This summary is machine-generated.

A novel microsphere-assisted nanoscope enhances white light interference microscopy for nanoscale material characterization. This technique improves lateral resolution for non-destructive, label-free local reflectance mapping.

Keywords:
Local SpectroscopyMicrosphereNanoscopyReflectanceResolutionWhite Light Interference Microscopy

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Area of Science:

  • Materials Science
  • Optical Metrology
  • Nanotechnology

Background:

  • Characterizing novel materials at the nanoscale presents significant challenges.
  • Existing techniques may lack the resolution or invasiveness required for certain measurements.

Purpose of the Study:

  • To present a new microsphere-assisted white light interference nanoscope for nanoscale local reflectance mapping.
  • To demonstrate improved lateral resolution for material characterization.

Main Methods:

  • Utilized a 145 μm diameter microsphere attached to an optical fiber within a white light interference microscope.
  • Employed Fourier transform processing of interference image stacks to extract local reflectance.
  • Operated over a wavelength range of 460-900 nm with an 8 μm field of view.

Main Results:

  • Achieved an enhanced lateral resolution from 940 nm to 520 nm.
  • Successfully spectrally distinguished neighboring ripples on a laser-textured stainless-steel sample, spaced 279 nm apart.
  • Demonstrated non-destructive, full-field, and label-free local reflectance mapping.

Conclusions:

  • The microsphere-assisted nanoscope significantly improves lateral resolution for reflectance mapping.
  • This technique enables detailed nanoscale characterization of material surfaces.
  • Future work aims for sub-diffraction reflectance mapping with 100 nm resolution.