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    This study introduces an optimized polarization chiral sensor using weak measurement for sensitive chiral molecule detection. The novel sensor achieves high signal-to-noise ratio and a resolution of 2×10⁻⁵ rad.

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    Area of Science:

    • Optics and Photonics
    • Analytical Chemistry
    • Chiroptical Spectroscopy

    Background:

    • Optical rotation is a key property of chiral molecules.
    • Existing methods for measuring optical rotation can be limited by sensitivity and stability.
    • Accurate detection of chiral substances is crucial in various scientific fields.

    Purpose of the Study:

    • To develop and optimize a novel polarization chiral sensor.
    • To enhance the sensitivity and signal-to-noise ratio for optical rotation measurements.
    • To achieve high-resolution detection of chiral media using weak measurement principles.

    Main Methods:

    • Implementation of a polarization chiral sensor utilizing a weak measurement light path.
    • Theoretical optimization of phase shift and polarization angle difference for enhanced sensitivity.
    • Experimental verification of the sensor's performance with the integration of a reference light.

    Main Results:

    • The optimized sensor demonstrated significantly improved sensitivity.
    • Introduction of a reference light effectively minimized fluctuations from the light source.
    • Achieved a high signal-to-noise ratio and an optical rotation resolution of 2 × 10⁻⁵ rad.

    Conclusions:

    • The developed sensor offers a low-cost, high-sensitivity, and real-time detection method.
    • This technique shows strong potential for applications in chemical analysis, particularly for chiral molecule detection.
    • The weak measurement approach combined with a reference light provides a robust platform for chiroptical sensing.