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Extreme ultraviolet Fourier-transform spectroscopy with high order harmonics
M Kovacev1, S V Fomichev, E Priori
1CEA/DSM/DRECAM/SPAM, bât. 522, Centre d'Etudes de Saclay, 91191 Gif-sur-Yvette, France.
Physical Review Letters
|December 31, 2005
Summary
Scientists developed extreme ultraviolet (XUV) Fourier-transform spectroscopy using two phase-locked high-harmonic beams. This enables interferogram measurements at 90 nm, paving the way for high-resolution XUV absorption spectroscopy and attosecond time-scale phase control.
Area of Science:
- Physics
- Spectroscopy
- Quantum Optics
Background:
- Fourier-transform spectroscopy (FTS) is a powerful technique for spectral analysis.
- Extreme ultraviolet (XUV) radiation offers unique probing capabilities due to its elemental sensitivity and short wavelengths.
- Performing high-resolution spectroscopy in the XUV region presents significant technical challenges.
Purpose of the Study:
- To demonstrate a novel scheme for XUV Fourier-transform spectroscopy.
- To enable high-resolution absorption spectroscopy in the XUV spectral range.
- To achieve precise control over the relative phase of XUV pulses on an attosecond timescale.
Main Methods:
- Generation of two phase-locked high-harmonic beams.
- Implementation of an interferometric setup for XUV measurements.
- Utilizing Fourier-transform analysis of the generated interferograms.
Main Results:
- Successful demonstration of XUV Fourier-transform spectroscopy.
- Measurement of interferograms at wavelengths as short as 90 nm.
- Attainment of precise control over the relative phase of harmonic pulses with attosecond accuracy.
Conclusions:
- The developed scheme opens new possibilities for high-resolution XUV absorption spectroscopy.
- The precise phase control is crucial for future attosecond pump-XUV probe spectroscopy.
- This work advances the capabilities for studying ultrafast dynamics in the XUV spectral region.