Journal
OPTICS EXPRESS
Volume 19, Issue 23, Pages 22377-22387Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.022377
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Funding
- AFOSR [FA9550-09-1-0212, FA9550-10-1-0063]
- Center for Free-Electron Laser Science at DESY, Hamburg
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We numerically investigate the influence of plasma defocusing in high harmonic generation (HHG) by solving the first-order wave equation in an ionized medium and defining an enhancement factor to quantitatively analyze the influence of plasma defocusing. While degrading the driver pulse intensity, plasma also has a strong impact on HHG phase-matching. Combined with the HHG wavelength scaling law, our results give an estimate of HHG efficiencies with different driver wavelengths and show a limited HHG efficiency in high density media. (C) 2011 Optical Society of America
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