Recent trends in high-order harmonic generation in solids

Park, Jongkyoon; Amutha, S.; Kim, Seungchul; Ciappina, M. F.

doi:10.1080/23746149.2021.2003244

Cited by 24 publications

(11 citation statements)

References 134 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, strong-field physics and nonlinear optical processes in solids have been intensely investigated. − Such processes allow the probing and manipulating of ultrafast electron dynamics and properties of materials with potential attosecond resolution. − For instance, high-harmonic generation (HHG) provides routes for exploring dynamical correlations, − electron–phonon coupling, , spectral caustics, exciton formation and dissociation, topology, − and more. ,, Nonlinear photocurrent generation similarly allows investigation of electron coherence and correlations. ,− Specifically in the realm of two-dimensional (2D) hexagonal materials with valley degrees of freedom, − intense femtosecond lasers have been used to nonresonantly control and read the valley pseudospin, ,− which has technological implications for petahertz electronics, spintronics, and memory devices.…”

mentioning

confidence: 99%

Mapping Light-Dressed Floquet Bands by Highly Nonlinear Optical Excitations and Valley Polarization

Galler,

Rubio,

Neufeld

2023

J. Phys. Chem. Lett.

View full text Add to dashboard Cite

Ultrafast nonlinear optical phenomena in solids have been attracting a great deal of interest as novel methodologies for the femtosecond spectroscopy of electron dynamics and control of the properties of materials. Here, we theoretically investigate strong-field nonlinear optical transitions in a prototypical two-dimensional material, hBN, and show that the k -resolved conduction band charge occupation patterns induced by an elliptically polarized laser can be understood in a multiphoton resonant picture, but, remarkably, only if using the Floquet light-dressed states instead of the undressed matter states. Our work demonstrates that Floquet dressing affects ultrafast charge dynamics and photoexcitation even from a single pump pulse and establishes a direct measurable signature for band dressing in nonlinear optical processes in solids, opening new paths for ultrafast spectroscopy and valley manipulation.

show abstract

mentioning

confidence: 99%

Mapping Light-Dressed Floquet Bands by Highly Nonlinear Optical Excitations and Valley Polarization

Galler,

Rubio,

Neufeld

2023

J. Phys. Chem. Lett.

View full text Add to dashboard Cite

show abstract

“…In our case, on the contrary, the blue-shift is given by the principal frequency that is a characteristic of the laser pulse itself and is, therefore, independent of the medium. This fact would allow to apply the principal frequency concept in other nonlinear processes, for instance, the above-threshold ionization (ATI) in atoms [40] or HHG in solids [41], just to name a few. The original idea behind the introduction of the principal frequency was to give a higher "weight" to the more energetic frequencies (or photons) in the density distribution ρ P (ω) = ωS(ω).…”

Section: Discussionmentioning

confidence: 99%

Principal frequency, super-bandwidth, and low-order harmonics generated by super-oscillatory pulses

Neyra¹,

Biasetti²,

Videla³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

An alternative definition to the main frequency of an ultra-short laser pulse, named principal frequency (ωP ), was recently introduced in E.G. Neyra, et al. Phys. Rev. A 103, 053124 (2021), resulting in a more transparent description of the nonlinear dynamics of a system driven by this coherent source. In this work, we extend the definition of ωP incorporating the spectral phase of the pulse. This upgraded definition allow us to deal with super-oscillatory pulses as well as to characterize sub-cycle pulses with a complex spectral content. Simultaneously, we study the nonlinear interaction between a few-cycle super-oscillatory pulse with a gaseous system, analysing the spectral characteristics of the fundamental, third and fifth harmonics. Here, we make use of an ab-initio quantum mechanical approach, supplemented with a wavelet analysis. We show that the spectral characteristics of the low-order harmonics are very well explained in terms of ωP , as well as the effective bandwidth of the super-oscillatory pulse. Our findings reinforce previous results that showed an increase of the effective bandwidth in the super-oscillatory region and the possibility to generate unique frequencies by a linear synthesis. We open, thus, not only new perspectives in ultrafast optics, exploring novel pathways towards the generation of fully tunable strong and short coherent sources, but also discuss possible extensions of the concepts presented here to other wave phenomena, that can be found in acoustics, signal processing or quantum mechanics.

show abstract

“…have provided the possibility of generating ultrashort laser pulses down to few femtoseconds with high intensities up to 10 22 W/cm 2 [2]. The interaction of ultrashort laser pulses with atoms and solid-state targets can cause amazing phenomena such as laser wakefield acceleration [3,4], ion beam acceleration [5,6], laser-driven fusion [7,8], high-order harmonic generation (HHG) [9,10], radiation generation [11,12], nuclear resonance fluorescence [13], vacuum birefringence [14][15][16], electron-positron pair production from vacuum [17,18], photon-photon scattering [19,20], electromagnetic cascades [21,22], etc.…”

Section: Introductionmentioning

confidence: 99%

High-order harmonic generation, attosecond pulse train, and non- sequential double ionization in the helium atom under high-intensity femtosecond laser pulses

Zakavi

Sabaeian

2023

Preprint

View full text Add to dashboard Cite

High-order harmonic generation (HHG), attosecond pulse train (APT), and non-sequential double ionization (NSDI) in the He atom under high intense femtosecond laser pulses are calculated by time-dependent Schrodinger equation (TDSE) in one dimension (1D). By considering the mutual electron-electron and electron-nuclei interactions along with calculating the He atom ground state wave function by imaginary time propagation (ITP) method, besides calculating probability density of electrons, dipole acceleration, HHG, and APT, we could generate the well-known "knee structure" in the probability of the He atom ionization against the intensity in an ionization boundary condition model. The results are in good agreement with the experimental data reported by Walker et al. [B. Walker et al. Phys. Rev. Lett. 73, 1227 (1994)].

show abstract

Recent trends in high-order harmonic generation in solids

Cited by 24 publications

References 134 publications

Mapping Light-Dressed Floquet Bands by Highly Nonlinear Optical Excitations and Valley Polarization

Mapping Light-Dressed Floquet Bands by Highly Nonlinear Optical Excitations and Valley Polarization

Principal frequency, super-bandwidth, and low-order harmonics generated by super-oscillatory pulses

High-order harmonic generation, attosecond pulse train, and non- sequential double ionization in the helium atom under high-intensity femtosecond laser pulses

Contact Info

Product

Resources

About