Generation of isolated sub-40-attosecond pulse with a multicycle chirped laser and a static electric field

Mohebbi, Masoud

doi:10.1007/s00340-015-6313-8

Cited by 4 publications

(2 citation statements)

References 36 publications

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“…Intensity (arb. units) In the case of HHG in gas, the introduction of chirp pulse and static electric field can greatly improve the cutoff frequency, [11,44,45] and enhance the harmonic efficiency. [46,47] However, in our work, the intensity of the harmonic plateau is improved, but the cutoff cannot be extended.…”

Section: Resultsmentioning

confidence: 99%

“…Spatially inhomogeneous fields, [6] two-color field, [7] and its combination with chirped pulse, [8,9] as well as the combination of static electric field and chirp [9,10] are used to extend the cutoff energy. For example, Mohebbi [11] used the combination of chirped laser pulse, non-chirped laser pulse and static electric field to drive helium atoms to enhance HHG, and then synthesized a clean 38 as isolated attosecond pulse. Liu et al [12] introduced a two-color chirped pulse to extend the platform of HHG, and also added a controlled IR or UV pulse to improve the harmonic efficiency.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-order harmonic generation of ZnO crystals in chirped and static electric fields

Zhang 张,

He 何,

Xie 谢

et al. 2024

Chinese Phys. B

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High harmonic generation (HHG) in ZnO crystals under chirped single-color field and static electric field are investigated by solving the semiconductor Bloch equation (SBEs). It is found that when the chirp pulse is introduced, the interference structure become obvious while the harmonic cutoff is not extended. Furthermore, the harmonic efficiency is improved when the static electric field is included. These phenomena are demonstrated by the classical recollision model in real space affected by the waveform of laser field and inversion symmetry. Specifically, the electron motion in k-space shows that the change of waveform and the destruction of the symmetry of the laser field lead to the incomplete X-structure of the crystal-momentumresolved (k-resolved) inter-band harmonic spectrum. Furthermore, a pre-acceleration process in the solid four-step model is confirmed.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-order harmonic generation of ZnO crystals in chirped and static electric fields

Zhang 张,

He 何,

Xie 谢

et al. 2024

Chinese Phys. B

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Higher-order harmonics generation based on near-field scattered laser pulse in Au-Si core-shell nanospheres

Amini

Mohebbi

2021

Chemical Physics

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The control of electron quantum trajectories on the high-order harmonic generation of CO and N2 molecules in the presence of a low frequency field

Koushki

Sadighi‐Bonabi

Mohsen-Nia

et al. 2018

The Journal of Chemical Physics

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In the present work, an efficient method is theoretically investigated for extending high-order harmonics and ultrashort attosecond pulse generation in N and CO molecules by using the time-dependent density functional theory approach. Our results show that by utilizing chirped laser field in the presence of a low frequency field, not only is the harmonic cutoff extended remarkably but also the single short quantum trajectory is selected to contribute to the harmonic spectra. When a low frequency field is added to the two-color chirped laser field, the long quantum trajectories are suppressed and only the short quantum trajectories contribute to the higher harmonic emission mechanism. As a result, the spectral modulation is significantly decreased and an intense ultrashort pulse can be generated from the supercontinuum region of high harmonics. With such a scheme, the isolated ultrashort attosecond pulses can be generated in length, velocity, and acceleration gauges. Furthermore, these results are explained by using the classical and quantum time-frequency analyses.

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Generation of isolated sub-40-attosecond pulse with a multicycle chirped laser and a static electric field

Cited by 4 publications

References 36 publications

High-order harmonic generation of ZnO crystals in chirped and static electric fields

High-order harmonic generation of ZnO crystals in chirped and static electric fields

Higher-order harmonics generation based on near-field scattered laser pulse in Au-Si core-shell nanospheres

The control of electron quantum trajectories on the high-order harmonic generation of CO and N2 molecules in the presence of a low frequency field

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