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High-order harmonics generation in Cd and Pd laser-induced plasmas
Optics Express
|September 15, 2023
Summary
Researchers generated high-order harmonics in palladium and cadmium plasmas using tunable laser pulses. Two-color laser pumping broadened harmonic generation, with theoretical aspects discussed.
Area of Science:
- Plasma Physics
- Quantum Optics
- Atomic Physics
Background:
- High-order harmonic generation (HHG) is a key process for producing extreme ultraviolet (XUV) and soft X-ray radiation.
- Resonance enhancement in HHG can significantly increase the efficiency and spectral range of generated harmonics.
- Laser-induced plasmas provide a medium for nonlinear optical processes like HHG.
Purpose of the Study:
- To demonstrate and investigate high-order harmonic generation in palladium (Pd) and cadmium (Cd) plasmas.
- To explore resonance enhancement of HHG by adjusting the driving laser pulse wavelength.
- To investigate the effect of two-color laser pumping on broadening the harmonic spectrum.
Main Methods:
- Generation of high-order harmonics from laser-induced Pd and Cd plasmas.
- Systematic adjustment of the driving laser pulse wavelength to probe resonance conditions.
- Application of a two-color laser pump scheme to induce nonlinear interactions.
Main Results:
- Successful generation of high-order harmonics in both palladium and cadmium plasmas.
- Observed resonance enhancement in specific extreme ultraviolet (XUV) spectral ranges.
- Achieved a broader harmonic spectrum through the summation of incommensurate waves using two-color pumping.
Conclusions:
- Two-color pumping of laser-induced plasmas is an effective method for broadening high-order harmonic generation.
- Resonance effects play a crucial role in optimizing HHG efficiency and spectral coverage.
- The study provides insights into the theoretical framework of two-color laser-plasma interactions for advanced light source generation.
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