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    Area of Science:

    • Spectroscopy
    • Quantum Mechanics
    • Physical Chemistry

    Background:

    • Two-dimensional electronic spectroscopy (2DES) is a powerful technique for studying ultrafast dynamics.
    • Precise phase information is crucial for accurate interpretation of 2DES data.
    • Current phasing methods can be complex and require additional experimental setups.

    Purpose of the Study:

    • To develop a new, convenient method for determining the precise phase of pulse sequences in 2DES.
    • To implement this method using only built-in spectral interferometry.
    • To avoid phase ambiguities associated with beam propagation in samples.

    Main Methods:

    • Utilizing built-in spectral interferometry for phase determination.
    • Incorporating additional scanning and data-fitting processes.
    • Performing measurements with the sample in place to calibrate the absolute phase at the interaction region.

    Main Results:

    • A new method for precise phase determination in 2DES has been successfully proposed.
    • The method is easily implemented without supplementary instrumental construction.
    • It effectively calibrates the absolute phase at the exact interaction region, avoiding sample-related ambiguities.

    Conclusions:

    • The proposed method offers a more convenient and accurate approach to phasing in 2DES.
    • It simplifies the experimental procedure by leveraging existing capabilities.
    • This advancement is expected to improve the overall efficiency and reliability of 2DES experiments.