Zeptosecond High Harmonic keV X-Ray Waveforms Driven by Midinfrared Laser Pulses

Hernández-García, Carlos; Pérez-Hernández, J. A.; Popmintchev, Tenio; Murnane, Margaret M.; Kapteyn, Henry C.; Jaroń-Becker, Agnieszka; Becker, Andreas; Plaja, Luis

doi:10.1103/physrevlett.111.033002

Cited by 140 publications

(99 citation statements)

References 41 publications

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“…Note that the spikelike behaviors of the EWP (or the HHG yield) become more pronounced as the laser wavelength increases. They have been observed previously in both numerical and analytical HHG calculations [12,31]. The present analysis shows that between the two threshold energies ε 3 and ε 5 (i.e., for 1.5 Ẽ 3.17 ), the EWP can be well approximated by…”

Section: Comparisons Of Analytic Scaling Laws With Tdse and Qrs Rsupporting

confidence: 63%

“…As the wavelength increases, these beneficial macroscopic features of the target medium for phase matching compete with the negative feature of the microscopic singleatom HHG yield, which decreases rapidly [1,10]. Therefore, the dependence (or scaling) of the single-atom HHG yield as a function of laser wavelength has become crucially important for the generation of attosecond [4,11] and even, possibly, zeptosecond pulses [12]. Consequently, different schemes for achieving a more favorable λ dependence of the single-atom HHG yield have been suggested [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Scaling laws for high-order-harmonic generation with midinfrared laser pulses

et al. 2015

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We derive an analytic expression for the wavelength scaling of the high-order-harmonic generation (HHG) yield induced by midinfrared driving laser fields. It is based on a quasiclassical description of the returning electron wave packet, which is shown to be largely independent of atomic properties. The accuracy of this analytic expression is confirmed by comparison with results of numerical solutions of the time-dependent Schrödinger equation for wavelengths in the range of 1.4 μm ≤ λ ≤ 4 μm. We verify the wavelength scaling of the HHG yield found numerically for midinfrared laser fields in a recent paper by Le et al. [Phys. Rev. Lett. 113, 033001 (2014)].

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Section: Comparisons Of Analytic Scaling Laws With Tdse and Qrs Rsupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Scaling laws for high-order-harmonic generation with midinfrared laser pulses

et al. 2015

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“…Specifically, this can be achieved using midinfrared driving laser fields (see, e.g., Refs. [30,31]). Alternatively, x-ray radiation from free electron lasers [32] can serve as a novel tool for synthesis of ultra-short pulses, which are expected to reach hundreds of zeptoseconds [33].…”

Section: Introductionmentioning

confidence: 99%

Supercontinuum and ultrashort-pulse generation from nonlinear Thomson and Compton scattering

2014

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Nonlinear Thomson and Compton processes, in which energetic electrons collide with an intense optical pulse, are investigated in the framework of classical and quantum electrodynamics. Spectral modulations of the emitted radiation, appearing as either oscillatory or pulsating structures, are observed and explained. It is shown that both processes generate a bandwidth radiation spanning the range of few MeV, which occurs in a small cone along the propagation direction of the colliding electrons. Most importantly, these broad bandwidth structures are temporarily coherent which proves that Thomson and Compton processes lead to generation of a supercontinuum. It is demonstrated that the radiation from the supercontinuum can be synthesized into zeptosecond (possibly even yoctosecond) pulses. Thus, confirming that Thomson and Compton scattering can be used as novel sources of an ultra-short radiation, opening routes to new physical domains for strong laser physics.

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“…The answers to these questions are vital to set the boundary for attosecond physics based on the recollision concept. In particular, for the generation of hard x-ray attosecond radiation [41] and laser induced electron diffraction imaging used to investigate dynamics with sub-angstrom, attosecond precision [42,43].…”

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confidence: 99%

Limits of Strong Field Rescattering in the Relativistic Regime

Klaiber

Hatsagortsyan

et al. 2017

Phys. Rev. Lett.

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Recollision for a laser driven atomic system is investigated in the relativistic regime via a strong field quantum description and Monte Carlo semiclassical approach. We find the relativistic recollision energy cutoff is independent of the ponderomotive potential U_p, in contrast to the well-known 3.2U_p scaling. The relativistic recollision energy cutoff is determined by the ionization potential of the atomic system and achievable with non-negligible recollision flux before entering a “rescattering free” interaction. The ultimate energy cutoff is limited by the available intensities of short wavelength lasers and cannot exceed a few thousand Hartree, setting a boundary for recollision based attosecond physics

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Zeptosecond High Harmonic keV X-Ray Waveforms Driven by Midinfrared Laser Pulses

Cited by 140 publications

References 41 publications

Scaling laws for high-order-harmonic generation with midinfrared laser pulses

Scaling laws for high-order-harmonic generation with midinfrared laser pulses

Supercontinuum and ultrashort-pulse generation from nonlinear Thomson and Compton scattering

Limits of Strong Field Rescattering in the Relativistic Regime

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