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(Color online) Harmonic spectra obtained from the Ag, Al, Al powder, and Be plasmas in the case of driving radiation.
(Color online) Single harmonic enhancement obtained in the cases of the pulses propagated through the (a) tin, (b) chromium, and (c) manganese plasmas. Insets in (a)–(c) show the enhancement of single and multiple harmonics obtained for pulses.
(Color online) Ratio of the enhanced harmonic and neighboring harmonic intensities obtained at different chirps and pulse durations of the driving radiation propagated through the Mn and Sb plasmas. Inset: Single harmonic variation at the different chirps of radiation in the cases of indium, chromium, and antimony plasmas. Positive and negative signs of pulse duration correspond to the positive and negative chirps of laser radiation.
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