High-order harmonic generation via multicolor beam superposition

Sarikhani, S.; Batebi, S.

doi:10.1007/s00340-017-6805-9

Cited by 11 publications

(1 citation statement)

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“…2 High order harmonics (HOHs) that generate via the tunneling or OBI process can be described with the so called simple man's three-step model [3,13,14]. Several experimental and theoretical studies have been carried out on HHG and attosecond pulse generation especially in + H 2 as simple diatomic ion [15][16][17][18][19][20][21][22][23][24]. Electron iocalization and dynamics, in + H 2 under the Born-Oppenheimer (BO) [20,21] or non-BO [22][23][24][25][26] approximation have been investigated in one [20,22] or three [21,23,24] dimensional approaches.…”

Section: Introductionmentioning

confidence: 99%

Attosecond pulse generation via multicolor beam superposition in the over-barrier ionization regime

Sarikhani¹,

Farmani²,

Batebi³

2018

J. Opt.

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Based on coherent superposition of multicolor continuous wave beams, high order harmonics and attosecond pulse generation from a hydrogen molecular ion (HMI), with different internuclear distances, R, are studied. Driving pulse intensity was taken to be 400 TW cm−2, which can ionize an ion with R > Rb = 2.4 a.u. over the barrier. It is seen that cutoff harmonic with respect to R decreases until the over barrier ionization threshold, Rb, then becomes almost uniform to the end of R = 10 a.u. whereas it is almost constant with respect to the spectral width of the beams, Δω. Besides attosecond pulse intensity increases versus R, and decreases with respect to Δω so that the most intense attosecond pulses can be generated from HMIs with R ≥ 5 a.u. via the pulses by Δω ≤ 0.03 a.u. Attosecond pulse durations were insensitive to both Δω and R.

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