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    A new scanning dual-comb spectroscopic microscopy (S-DCSM) system provides detailed spectral and polarization imaging for transparent samples. This advanced optical microscopy technique enables precise characterization for materials science and biological studies.

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    Area of Science:

    • Optics and Photonics
    • Spectroscopy
    • Microscopy

    Background:

    • Transparent and semi-transparent samples require advanced techniques for comprehensive optical characterization.
    • Existing methods may lack the ability to simultaneously acquire multidimensional spectral and polarization information.

    Purpose of the Study:

    • To develop and demonstrate a scanning dual-comb spectroscopic microscopy (S-DCSM) system.
    • To enable multidimensional optical information acquisition, including spectral and polarization properties.

    Main Methods:

    • Utilized a scanning dual-comb spectroscopic microscopy (S-DCSM) system.
    • Employed optical frequency combs (OFCs) for broad spectral coverage.
    • Performed spectral imaging of absorbance, optical phase, optical thickness, linear dichroism, and birefringence.

    Main Results:

    • Successfully measured the spatial distribution of optical thickness in HeLa cells (8.19 ± 0.34 μm).
    • Quantified linear dichroism (0.00464 ± 0.00043) and birefringence (-0.014 ± 0.072) in cellophane tape at 1560.25 nm.
    • Demonstrated the system's capability for simultaneous spectral and polarization imaging.

    Conclusions:

    • The S-DCSM system offers versatile, multidimensional optical characterization of transparent samples.
    • This technique provides a powerful tool for detailed quantitative analysis in materials science and biological studies.
    • Represents a significant advancement in acquiring comprehensive optical information.