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Dynamic ellipsometry measurement based on a simplified phase-stable dual-comb system.

Ruixue Zhang, Liheng Shi, Siyu Zhou

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    |March 18, 2022
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    This summary is machine-generated.

    This study introduces dynamic spectroscopic ellipsometry using a simplified dual-comb system for rapid optical property measurements. The new method overcomes limitations of conventional techniques, achieving high precision in thin-film thickness determination.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Spectroscopy

    Background:

    • Conventional spectroscopic ellipsometry faces challenges with mechanical instability and slow measurement speeds.
    • Previous dual-comb spectroscopic ellipsometry systems have complex designs limiting practical application.

    Purpose of the Study:

    • To present and demonstrate a dynamic spectroscopic ellipsometry system.
    • To enable online, real-time measurement of material optical properties.
    • To overcome the limitations of existing spectroscopic ellipsometry techniques.

    Main Methods:

    • Development of a simplified, phase-stable dual-comb system.
    • Implementation of dynamic spectroscopic ellipsometry for real-time measurements.
    • Investigation of system performance at a high data acquisition rate (1 kHz).

    Main Results:

    • Achieved a precision of 1.31 nm and a combined uncertainty of 13.80 nm (k=2) for thin-film thickness measurements.
    • Demonstrated a dynamic resolution of the ellipsometric parameter better than 0.1 rad.
    • Validated the system's capability for online dynamic optical property measurement.

    Conclusions:

    • The simplified phase-stable dual-comb system enables practical dynamic spectroscopic ellipsometry.
    • The developed system offers high precision and dynamic resolution for material characterization.
    • This advancement facilitates real-time monitoring of optical properties in various applications.