Enhancement of high harmonics from plasmas using two-color pump and chirp variation of 1 kHz Ti:sapphire laser pulses | Zendy

R. A. Ganeev | Zendy; C. Hutchison | Zendy; A. Zaïr | Zendy; Tobias Witting | Zendy; F. Frank | Zendy; W. A. Okell | Zendy; J. W. G. Tisch | Zendy; J. P. Marangos | Zendy

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Enhancement of high harmonics from plasmas using two-color pump and chirp variation of 1 kHz Ti:sapphire laser pulses

Author(s) -

R. A. Ganeev,

C. Hutchison,

A. Zaïr,

Tobias Witting,

F. Frank,

W. A. Okell,

J. W. G. Tisch,

J. P. Marangos

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.20.000090

Subject(s) - harmonics , high harmonic generation , laser , optics , chirp , plasma , materials science , harmonic , sapphire , resonance (particle physics) , femtosecond , atomic physics , physics , acoustics , voltage , quantum mechanics

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 20th harmonic in silver plasma (2×), 26th harmonic in vanadium plasma (4×), and 28th harmonic in chromium plasma (5×).

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