Isolated short attosecond pulse generation in an orthogonally polarized multicycle chirped laser field

Xu, Jun

doi:10.1103/physreva.83.033823

Cited by 16 publications

(4 citation statements)

References 24 publications

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“…One of the most noticeable features of the nonlinear process in laser-matter interaction is the generation of coherent radiation from the UV to XUV range. High-order harmonic generation (HHG) from atoms or molecules has been widely investigated in the past two decades as one of the most attractive methods for producing isolated attosecond XUV radiation [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Coherent XUV pulse generation using a chirped pulse combined with a unipolar pulse

Feng¹,

Liu²

2014

Laser Phys.

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High-order harmonic emission and attosecond XUV source generation have been theoretically investigated using a chirped pulse combined with a unipolar pulse. It shows that the harmonic plateau is very sensitive to the chirp parameter and the intensity, pulse duration and relative position of the unipolar pulse. Further, by optimizing the laser parameters, a 714 eV supercontinuum bandwidth with a single short quantum path contribution has been obtained. Finally, by superposing the selected harmonic spectrum from the 70th to the 470th orders, an isolated attosecond pulse with a duration of 36 as can be obtained.

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Section: Introductionmentioning

confidence: 99%

Coherent XUV pulse generation using a chirped pulse combined with a unipolar pulse

Feng¹,

Liu²

2014

Laser Phys.

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“…It may be mentioned that shaped pulses are also studied to enhance the transient population of excited states [26] and obtain total inversion of electronic state population in molecules [33]. Again, it may be noted that nonlinearly chirped laser pulses have been found suitable for many applications [34][35][36][37][38]. In this work, the phenomenon of coherent population transfer is investigated by numerically solving the appropriate density-matrix equations beyond the rotating-wave approximation.…”

Section: Introductionmentioning

confidence: 99%

Gaussian and sinc-shaped few-cycle-pulse-driven ultrafast coherent population transfer inΛ-like atomic systems

Kumar

Sarma

2012

Phys. Rev. A

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We report and propose a simple scheme to achieve efficient and fast coherent population transfer by utilizing either a nonlinearly chirped Gaussian-shaped few-cycle laser pulse or an unchirped sinc-shaped few-cycle laser pulse. The proposed scheme is shown to be fairly robust against the variation of the laser parameters such as temporal pulse width, chirp rates, carrier-envelope phases, and Rabi frequencies. We find that compared to the so-called stimulated Raman adiabatic passage technique, our scheme for complete population transfer with few-cycle Gaussian-shaped laser pulses requires less pulse area.

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“…3(b) can be treated as an isolated 46-as pulse, since the strength of the second-largest attosecond pulse is only 0.017 times that of the main pulse. By compensating for the chirp of the supercontinuum, which is on the assumption that the phases of the harmonics are the same, [29,30,37] an isolated 7-as pulse with a clean profile can be attained, as shown in the inset. From Fig.…”

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confidence: 99%

Extending the High-Order Harmonics Plateau and Isolated Attosecond Pulse Generation in an Intense Three-Color Laser Field

Miao

2012

Spectroscopy Letters

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We propose a method to extend the high-order harmonics plateau and generate an isolated sub-10-as pulse by adding a weak control pulse (10 fs, 1600 nm) to modify a two-color laser field (5 fs, 800 nm; 10 fs, 400 nm). The numerical results show that the plateau is extended obviously in the three-color laser field regime. Additionally, the ionization rate and classical returning kinetic-energy maps are calculated to better understand the physical origin of the high-order harmonics generation (HHG). By means of the ionization probability and the time-frequency distributions, more features of the HHG are revealed. Furthermore, our simulations show that the width of the plateau and the relative conversion efficiency of the harmonic spectra are highly dependent on the relative phase. Finally, by adjusting the relative phase and superposing a properly selected range of the HHG spectrum, an isolated attosecond pulse with a duration of 7 as is obtained.

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Isolated short attosecond pulse generation in an orthogonally polarized multicycle chirped laser field

Cited by 16 publications

References 24 publications

Coherent XUV pulse generation using a chirped pulse combined with a unipolar pulse

Coherent XUV pulse generation using a chirped pulse combined with a unipolar pulse

Gaussian and sinc-shaped few-cycle-pulse-driven ultrafast coherent population transfer inΛ-like atomic systems

Extending the High-Order Harmonics Plateau and Isolated Attosecond Pulse Generation in an Intense Three-Color Laser Field

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