Analysis of nonlinear self-interaction of femtosecond pulses during high-order harmonic generation in laser-produced plasma
- Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581 (Japan)
We present the z-scan studies of low-excited laser plasma showing a self-interaction of a femtosecond beam during the high-order harmonic generation in the laser plumes produced on the surfaces of different targets. This process was attributed to the ionization of neutrals and singly charged ions at the leading part of the laser pulse with further self-defocusing caused by the free electrons. The spatial distribution of the radiation propagating through the plasma showed an appearance of a ringlike shape at the intensities exceeding the barrier suppression intensity for singly charged ions. We show that this process leads to the restriction of the cutoff energy of high harmonics and the conversion efficiency from laser plasma.
- OSTI ID:
- 20768791
- Journal Information:
- Journal of the Optical Society of America. Part B, Optical Physics, Vol. 23, Issue 7; Other Information: DOI: 10.1364/JOSAB.23.001332; (c) 2006 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0740-3224
- Country of Publication:
- United States
- Language:
- English
Similar Records
High-order harmonic generation by chirped and self-guided femtosecond laser pulses. II. Time-frequency analysis
Enhanced High Harmonic Generation from Multiply Ionized Argon above 500 eV through Laser Pulse Self-Compression