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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Spectroscopy

    Background:

    • Terahertz (THz) technology offers non-destructive analysis capabilities.
    • Accurate material parameter extraction is crucial for industrial quality control.
    • Environmental factors like humidity can affect THz measurements.

    Purpose of the Study:

    • To introduce a novel terahertz material analysis approach.
    • To achieve highly accurate material parameter determination.
    • To demonstrate the method's applicability in industrial quality control scenarios.

    Main Methods:

    • Modeling inspected materials as stratified systems within their local environment.
    • Realistic description of light-matter interaction for each layer.
    • Implementation and validation in both time-domain and frequency-domain analyses.

    Main Results:

    • Demonstrated highly accurate material parameter extraction.
    • Successfully applied the method to quality control of coated paper sheets.
    • Validated the approach for analyzing car paint multilayers in humid air.

    Conclusions:

    • The proposed terahertz material analysis approach is effective for industrial quality control.
    • The method provides accurate material parameters even under challenging environmental conditions.
    • This technique has significant potential for applications in manufacturing and quality assurance.