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Related Experiment Video

Updated: Jul 16, 2025

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

5.8K

Hard x-ray - optical four-wave mixing using a split-and-delay line.

William K Peters, Jacob Feltman, Travis Jones

    Optics Express
    |September 15, 2023
    PubMed
    Summary
    This summary is machine-generated.

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    Researchers explored nonlinear spectroscopy using hard X-ray free-electron lasers (FELs). While no coherent signal was detected, the study provides crucial data for future experiments on X-ray induced lattice dynamics in solids.

    Area of Science:

    • Condensed matter physics
    • Ultrafast science
    • X-ray science

    Background:

    • Hard X-ray free-electron lasers (FELs) offer unprecedented temporal and spatial resolution.
    • Nonlinear optical spectroscopy methods are being extended to hard X-ray photon energies.
    • Understanding energy coupling in materials requires advanced spectroscopic techniques.

    Purpose of the Study:

    • To perform hard X-ray, optical four-wave mixing (4WM) measurements at 9.8 keV.
    • To investigate the coherence properties of X-ray excitations and their coupling to material degrees of freedom.
    • To establish experimental requirements for future nonlinear X-ray spectroscopy.

    Main Methods:

    • Utilized a split-and-delay line at the Linac Coherent Light Source (LCLS) for X-ray Correlation Spectroscopy (XCS).

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    Related Experiment Videos

    Last Updated: Jul 16, 2025

    Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
    15:58

    Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

    Published on: December 3, 2013

    5.8K
    Direct Imaging of Laser-driven Ultrafast Molecular Rotation
    10:52

    Direct Imaging of Laser-driven Ultrafast Molecular Rotation

    Published on: February 4, 2017

    9.8K
    Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
    10:42

    Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

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  • Created an X-ray transient grating (TG) using crossing X-ray beams.
  • Diffracted 400 nm optical laser pulses from the X-ray TG and varied pulse delays.

    • Main Results:

    • No coherent 4WM signal was observed in bismuth germinate (BGO), zinc oxide (ZnO), and yttrium aluminum garnet (YAG).
    • X-ray pulse delay scans provided insights into material and light source coherence.
    • Optical laser delay scans revealed X-ray induced lattice dynamics in the studied solids.

    Conclusions:

    • The absence of a coherent 4WM signal sets important parameters for future experiments.
    • The study demonstrates the potential of nonlinear spectroscopy in the hard X-ray regime.
    • This work is a significant step towards advancing time-resolved spectroscopy with hard X-rays.