Quantum path interferences and selection in interband solid high-order harmonic generation in MgO crystals

Shao, Tian-Jiao; Lü, Ling-Jie; Liu, Jiaqi; Bian, Xue-Bin

doi:10.1103/physreva.101.053421

Cited by 28 publications

(13 citation statements)

References 63 publications

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“…Our results therefore show that MgO a promising candidate for the generation of IAPs for solid targets. Finally, we note that a recent publication [41] on bulk MgO, using the one-dimensional semiconductor Bloch equation, predicts IAPs with a duration of 817-1000 as and a bandwidth of 20-35 eV for a two-cycle pulse with the wavelength of 1.6 µm.…”

Section: One-color Versus Two-color Pulses Hhgmentioning

confidence: 71%

High-harmonics and isolated attosecond pulses from MgO

Nourbakhsh,

Tancogne-Dejean,

Merdji

et al. 2020

Preprint

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On the basis of real-time ab initio calculations, we study the non-perturbative interaction of twocolor laser pulses with MgO crystal in the strong field regime to generate isolated attosecond pulse from high-harmonic emissions from MgO crystal. In this regard, we examine the impact of incident pulse characteristics such as its shape, intensity, and ellipticity as well as the consequence of the crystal anisotropy on the emitted harmonics and their corresponding isolated attosecond pulses. Our calculations predict the creation of isolated attosecond pulses with a duration of ∼ 300 attoseconds; in addition, using elliptical driving pulses, the generation of elliptical isolated attosecond pulses is shown. Our work prepares the path for all solid-state compact optical devices offering perspectives beyond traditional isolated attosecond pulse emitted from atoms.

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Section: One-color Versus Two-color Pulses Hhgmentioning

confidence: 71%

High-harmonics and isolated attosecond pulses from MgO

Nourbakhsh,

Tancogne-Dejean,

Merdji

et al. 2020

Preprint

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“…The trajectories with earlier ionization time and later recollision time are called long trajectories. On the contrary, the short trajectories have a later ionization time and earlier recollision time [55]. Figure 3b shows the long and short trajectories of the 17th harmonic in real space with different ionization time in ZnO crystals.…”

Section: Resultsmentioning

confidence: 99%

Visualization of the Preacceleration Process for High-Harmonic Generation in Solids

Gao

Zhang

et al. 2022

Symmetry

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The high-order harmonic generation (HHG) in ZnO is investigated by numerically solving semiconductor Bloch equations (SBEs), which can be explained well by a four-step model. In this model, preacceleration is the first step, in which the electron is accelerated in the valence band until it reaches the point of the minimum band gap. To prove the existence of the preacceleration process, SBE-based k-resolved harmonic spectra and the transient conduction-band population are presented. The results show that the contribution of crystal-momentum channels away from the minimum band gap via preacceleration is non-negligible. Furthermore, the X-shaped distribution in the k-resolved spectra can be described well by the preacceleration process. Based on the above analysis, we can conclude that the preacceleration process plays an important role in HHG.

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“…The generated IAPs have been reported so far with a limited bandwidths and mostly from bulk crystals. For instance, the predicted IAPs in recent theoretical works were found to cover the energy windows (16)(17)(18)(19)(20) eV in MoS 2 [27], (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) eV and (17.5-43) eV in bulk MgO [28,29], which in general are insufficient for time-resolved measurements on unprecedented time-scales.…”

Section: Introductionmentioning

confidence: 98%

Generation of Super Intense Isolated Attosecond Pulses from Trapped Electrons in Metal Surfaces

Adnani,

Taoutioui,

Makhoute

et al. 2022

Preprint

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Generation of ultrabroadband isolated attosecond pulses (IAPs) is essential for time-resolved applications in chemical and material sciences, as they have the potential to access the spectral water window region of chemical elements, which yet has to be established. Here we propose a numerical scheme for highly efficient high-order harmonic generation (HHG) and hence the generation of ultrabroadband IAPs in the XUV and soft x-ray regions. The scheme combines the use of chirped pulses with trapped electrons in copper transition-metal surfaces and takes advantage of the characteristic features of an infrared (IR) single-cycle pulse to achieve high conversion efficiencies and large spectral bandwidths. In particular, we show that ultrabroad IAPs with a duration of 370 as and with a bandwidth covering the photon energy range of 50-250 and 350-450 eV can be produced. We further show that introducing an additional IR single cycle pulse permits to enhance the harmonic yield in the soft x-ray photon energy region by almost 7 order of magnitude. Our findings thus elucidate the relevance of trapped electrons in metal surfaces for developing stable and highly efficient attosecond light sources in compact solid-state devices.

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Quantum path interferences and selection in interband solid high-order harmonic generation in MgO crystals

Cited by 28 publications

References 63 publications

High-harmonics and isolated attosecond pulses from MgO

High-harmonics and isolated attosecond pulses from MgO

Visualization of the Preacceleration Process for High-Harmonic Generation in Solids

Generation of Super Intense Isolated Attosecond Pulses from Trapped Electrons in Metal Surfaces

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