Journal
NANOMATERIALS
Volume 12, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/nano12234228
Keywords
B4C; Cr3C2; SiC; high-order harmonics generation; laser-induced plasma; chirped pulses
Categories
Funding
- Innovation Grant of Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP)
- Jilin Provincial Science and Technology Development Project [YDZJ202102CXJD002]
- Development Program of the Science and Technology of Jilin Province [20200802001GH]
- Chinese Academy of Sciences President's International Fellowship Initiative [2021PM0036, 2022VMA0012]
- European Regional Development Fund [1.1.1.5/19/A/003]
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In this study, we generated harmonics of laser pulses in the extreme ultraviolet range using carbon-containing plasma and analyzed the spectral characteristics. We found that the nanoparticles-contained plasma demonstrated chirp-related harmonic cut-off scaling, which was validated by simplified two-color pump model calculations.
Carbon-containing plasma is an attractive medium for generation of harmonics of laser pulses in the extreme ultraviolet range. We ablate two metal carbide (B4C and Cr3C2) nanoparticles and silicon carbide (SiC) nanoparticles and generate harmonics after propagation of 35 fs pulses through the laser-induced plasmas. We analyze the spectra, spectral shifts, and splitting of harmonics from nanoparticles-contained plasmas, which demonstrate the chirp-related harmonic cut-off scaling. In addition, we present the simplified two-color pump model calculations of HHG based on the strong field approximation.
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