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Direct Comparison of Hyperspectral Stimulated Raman Scattering and Coherent Anti-Stokes Raman Scattering Microscopy for Chemical Imaging
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Raman scattering yields cubic crystal grain orientation.

K Tesar1,2, I Gregora1, P Beresova1

  • 1Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, Prague 8, 182 21, Czech Republic.

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|June 30, 2019
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Summary
This summary is machine-generated.

This study introduces a novel optical Raman microscopy technique to determine cubic crystal grain orientation. The method utilizes polarization anisotropy, offering a non-destructive way to analyze crystal structures.

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Area of Science:

  • Materials Science
  • Crystallography
  • Spectroscopy

Background:

  • Accurate determination of crystal grain orientation is crucial for understanding material properties.
  • Conventional methods like electron backscatter diffraction can be destructive or require specialized equipment.

Purpose of the Study:

  • To develop a fully optical, non-destructive method for determining cubic crystal grain orientation using Raman microscopy.
  • To provide explicit formulas for calculating crystal grain orientation based on Raman scattering.

Main Methods:

  • Utilizing the polarization anisotropy of Raman scattering from doubly degenerate optic phonon modes.
  • Employing a standard Raman microscope with polarization analysis capabilities.
  • Deriving explicit mathematical formulas for orientation determination.

Main Results:

  • Demonstrated a feasible optical method for crystal grain orientation analysis.
  • Successfully compared orientations determined by Raman scattering with those from electron backscatter diffraction.
  • Validated the technique on a polycrystalline cubic lacunar spinel GaV4S8 sample.

Conclusions:

  • The proposed optical Raman scattering method is a viable alternative for determining cubic crystal grain orientation.
  • This technique offers a non-destructive and accessible approach for crystallographic analysis.
  • The method's accuracy is confirmed through comparison with established techniques.