Enhancement of high harmonics from plasmas using two-color pump and chirp variation of 1 kHz Ti: sapphire laser pulses
Optics Express, 2011•opg.optica.org
We have investigated resonance effects in high-order harmonic generation (HHG) within
laser-produced plasmas. We demonstrate a significantly improved harmonic yield by using
two-color pump-induced enhancement and a 1 kHz pulse repetition rate. Together with an
increased HHG output, the even harmonics in the cutoff region were enhanced with respect
to odd harmonics. We report the observation of a resonance-induced growth in intensity of
20^ th harmonic in silver plasma (2×), 26^ th harmonic in vanadium plasma (4×), and 28^ th …
laser-produced plasmas. We demonstrate a significantly improved harmonic yield by using
two-color pump-induced enhancement and a 1 kHz pulse repetition rate. Together with an
increased HHG output, the even harmonics in the cutoff region were enhanced with respect
to odd harmonics. We report the observation of a resonance-induced growth in intensity of
20^ th harmonic in silver plasma (2×), 26^ th harmonic in vanadium plasma (4×), and 28^ th …
We have investigated resonance effects in high-order harmonic generation (HHG) within laser-produced plasmas. We demonstrate a significantly improved harmonic yield by using two-color pump-induced enhancement and a 1 kHz pulse repetition rate. Together with an increased HHG output, the even harmonics in the cutoff region were enhanced with respect to odd harmonics. We report the observation of a resonance-induced growth in intensity of 20^th harmonic in silver plasma (2×), 26^th harmonic in vanadium plasma (4×), and 28^th harmonic in chromium plasma (5×).
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