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Updated: Jun 16, 2026
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Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Intensity correlation measurement system by picosecond single shot soft x-ray laser
Maki Kishimoto1, Kazumichi Namikawa, Kouta Sukegawa
1Quantum Beam Science Directorate, Japan Atomic Energy Agency, Kizugawa, Kyoto 619-0215, Japan.
The Review of Scientific Instruments
|February 2, 2010
Summary
A novel soft x-ray speckle intensity correlation spectroscopy system was developed using a brilliant plasma soft x-ray laser. This system enables picosecond time-resolved measurements of material polarization dynamics, advancing condensed matter physics research.
Area of Science:
- Condensed Matter Physics
- Materials Science
- X-ray Optics
Background:
- Soft x-ray lasers offer unique properties like high brilliance and coherence for advanced material analysis.
- Understanding polarization dynamics in ferroelectric materials is crucial for device applications.
Purpose of the Study:
- To develop a new soft x-ray speckle intensity correlation spectroscopy system.
- To enable picosecond time-resolved measurements of material properties.
- To probe relaxation phenomena in ferroelectric materials.
Main Methods:
- Utilized a single-shot, high-brilliant plasma soft x-ray laser with picosecond pulse width and high spatial coherence.
- Developed a Michelson-type delay pulse generator with a soft x-ray beam splitter for generating double coherent x-ray pulses.
- Employed a high-speed soft x-ray streak camera for picosecond time-resolved measurements.
Main Results:
- Successfully generated double coherent x-ray pulses with picosecond delay times.
- Performed x-ray speckle intensity correlation measurements on BaTiO(3) in its paraelectric phase.
- Probed the relaxation phenomena of polarizations in polarization clusters near the Curie temperature.
Conclusions:
- The developed soft x-ray speckle intensity correlation spectroscopy system is effective for probing ultrafast polarization dynamics.
- The system's performance was verified by studying relaxation phenomena in ferroelectric BaTiO(3).
- This technique opens new avenues for investigating dynamic processes in condensed matter systems.
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