Suppression of individual peaks in two-colour high harmonic generation

• URL: http://arxiv.org/abs/2007.15450v1
• Date: Thu, 30 Jul 2020 13:44:35 GMT
• Title: Suppression of individual peaks in two-colour high harmonic generation
• Authors: Sambit Mitra, Shubhadeep Biswas, Johannes Sch\"otz, Emilio Pisanty, Benjamin F\"org, Gautam Aditya Kavuri, Christian Burger, William Okell, Maximilian H\"ogner, Ioachim Pupeza, Vladimir Pervak, Maciej Lewenstein, Pawel Wnuk and Matthias F Kling
• Abstract summary: This work investigates the suppression of individual harmonics, simultaneously affecting specific even and odd orders in the high-harmonic spectra generated by strongly tailored, two-colour, multi-cycle laser pulses in neon.
• Score: 0.08066656283445782
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: This work investigates the suppression of individual harmonics, simultaneously affecting specific even and odd orders in the high-harmonic spectra generated by strongly tailored, two-colour, multi-cycle laser pulses in neon. The resulting spectra are systematically studied as a function of the electric-field shape in a symmetry-broken ($\omega$-$2\omega$) and symmetry-preserved ($\omega$-$3\omega$) configuration. The peak suppression is reproduced by macroscopic strong-field approximation calculations and is found to be unique to symmetry-broken fields ($\omega$-$2\omega$). Additionally, semi-classical calculations further corroborate the observation and reveal their underlying mechanism, where a nontrivial spectral interference between subsequent asymmetric half-cycles is found to be responsible for the suppression.

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