Frequency modulation of high-order harmonic fields with synthesis of two-color laser fields | Zendy

A. Amani Eilanlou | Zendy; Yasuo Nabekawa | Zendy; Kenichi L. Ishikawa | Zendy; Hiroyuki Takahashi | Zendy; Eiji J. Takahashi | Zendy; Katsumi Midorikawa | Zendy

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Frequency modulation of high-order harmonic fields with synthesis of two-color laser fields

Author(s) -

A. Amani Eilanlou,

Yasuo Nabekawa,

Kenichi L. Ishikawa,

Hiroyuki Takahashi,

Eiji J. Takahashi,

Katsumi Midorikawa

Publication year - 2010

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.18.024619

Subject(s) - optics , chirp , physics , anharmonicity , modulation (music) , field (mathematics) , fundamental frequency , laser , amplitude , frequency modulation , harmonic , amplitude modulation , high harmonic generation , bandwidth (computing) , quantum mechanics , acoustics , mathematics , telecommunications , computer science , pure mathematics

We report periodical frequency modulation of high-order harmonic fields observed by changing the delay between the driving two-color laser fields consisting of the fundamental and its second harmonic (SH) field. The amplitude of modulation has been up to ∼0.4 eV, which is larger than the bandwidth of the fundamental field. Experimental results show that the intensity and chirp of the fundamental field can control this phenomenon. Numerical analysis by solving the time-dependent Schrödinger equation approves of these results and shows that anharmonic frequency components of the SH field have a crucial role in this phenomenon.

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