Confocal Raman microscope with versatile dual polarization snapshot acquisition.

Area of Science:

• Spectroscopy
• Microscopy
• Materials Science

Background:

• Polarization-dependent measurements are crucial for understanding material properties.
• Confocal Raman microscopy is a powerful tool for chemical analysis.
• Existing methods face challenges with polarization-dependent efficiencies.

Purpose of the Study:

• To develop a new strategy for simultaneous co- and cross-polarized Raman spectra acquisition.
• To overcome the limitations of polarization-dependent diffraction grating efficiencies.
• To validate the accuracy of the proposed method for solid and liquid samples.

Main Methods:

• Implementation of a novel strategy for simultaneous polarized Raman measurements in a confocal microscope.
• Utilizing linear angle-resolved and circular polarization measurements.
• Acquisition of snapshot polarization measurements.

Main Results:

• The proposed strategy is immune to polarization-dependent diffraction grating efficiencies.
• Accurate polarization measurements were achieved for both solid and liquid samples.
• Results show good agreement with existing models and data.

Conclusions:

• The new strategy enables robust and accurate simultaneous polarized Raman spectroscopy.
• The method simplifies polarization measurements in confocal microscopy.
• Simultaneous acquisition of total Raman response and polarization degree offers valuable insights.