Description
Title: Investigation of Two-Component Laser-Produced Plasmas for Resonance-Enhanced High-Order Harmonics
Abstract: The mechanism underlying resonance-enhanced harmonics from plasma plumes created by lasers is still up for discussion. It is particularly unclear whether the plasma’s macroscopic dispersion characteristics play a major role in the development of the enhancement. We conduct experiments with two-component plasmas, where one component (tin) is known to be able to generate enhanced harmonics and the other component (lead) is known to change the overall dispersion properties of the plasma medium, to shed light on this issue. We contrast the harmonic spectra of plasmas made of pure tin and plasmas made of an alloy of tin and lead. We find enhanced harmonics at about 47 or 44 nm in both types of plasma, depending on the driving wavelength. Resonances in singly and doubly charged tin ions, respectively, may be responsible for the two enhanced regions. Our findings suggest that the resonance-enhanced harmonics in tin are not caused by the macroscopic plasma properties and that the presence of the enhanced harmonics in tin plasma is not destroyed by the presence of lead plasma.
Keywords: high-order harmonic generation; mixed laser-produced plasma; resonance enhancement;two-color pump
Paper Quality: SCOPUS / Web of Science Level Research Paper
Subject: Physics
Subject Category: Atomic and Molecular Physics, and Optics
Writer Experience: 20+ Years
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