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- Title
Atomic versus molecular plasmas for frequency conversion of laser radiation: stronger harmonics, larger cutoffs, better stability, resonance, and quasi-phase-matching enhancement.
- Authors
Ganeev, Rashid A.; Mirzaev, Bakhadir S.
- Abstract
High-order harmonic generation in laser-induced plasmas is analyzed from the point of view of presence of either molecular or atomic components. Comparison of boron carbide, carbon, and boron plasmas demonstrates the worsened characteristics of coherent extreme ultraviolet radiation in the case of B4C (smaller conversion efficiency, lower cutoff of generated harmonics, worsened stability). Similar features, alongside the disappearance of resonance-induced enhancement of harmonics and weakened quasi-phase-matching conditions, were observed in other molecular plasmas (Ag2S, GaAs, Cr3C2) compared with plasmas comprising atomic components (Ag, As, Cr). We discuss the reasons of worsening conditions in the case of high-order harmonic generation in few-atomic molecular species compared to the single-atomic ones.
- Subjects
FREQUENCY changers; LASER beams; PLASMA frequencies; HARMONIC generation; LASER plasmas; ATTOSECOND pulses; BORON carbides
- Publication
Applied Physics B: Lasers & Optics, 2024, Vol 130, Issue 5, p1
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s00340-024-08216-x