Results 21 to 30 of about 33,512 (252)
High-order harmonic generation in the presence of a resonance [PDF]
Physical Review A, 2011 We investigate high-order harmonic generation from laser-irradiated systems that support a shape resonance. From the numerical solution of the time-dependent Schrödinger equation, we calculate the harmonic spectra and the time-frequency analysis of the harmonic intensity and phase.
Tudorovskaya, Maria, Lein, Manfred
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Generation of Intense High-Order Vortex Harmonics [PDF]
Physical Review Letters, 2015 This paper presents the method for the first time to generate intense high-order optical vortices that carry orbital angular momentum in the extreme ultraviolet region. In three-dimensional particle-in-cell simulation, both the reflected and transmitted light beams include high-order harmonics of the Laguerre-Gaussian (LG) mode when a linearly ...
Zhang, X +8 more
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Applied Sciences, 2021 We study high-order harmonics generation from plasmas generated from graphite, fullerenes, carbon nanotubes, carbon nanofibers, diamond nanoparticles, and graphene.
Rashid A. Ganeev +3 more
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Spectral Shifts of Nonadiabatic High-Order Harmonic Generation
Applied Sciences, 2013 High-order harmonic generation (HHG) is a nonlinear nonperturbative process in ultrashort intense laser-matter interaction. It is the main source of coherent attosecond (1 as = 10−18 s) laser pulses to investigate ultrafast electron dynamics.
André D. Bandrauk, Xue-Bin Bian
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Attochirp-free high-order harmonic generation
Optics Express, 2011 A method is proposed for arbitrarily engineering the high-order harmonic generation phase achieved by shaping a laser pulse and employing xuv light or x rays for ionization. This renders the production of bandwidth-limited attosecond pulses possible while avoiding the use of filters for chirp compensation.
Kohler, M. +2 more
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High-order harmonic generation [PDF]
AIP Conference Proceedings, 1995 A brief overview of high‐order harmonic generation is given. Special emphasis is made on the use of this technique as a source of coherent radiation in the extreme ultraviolet. The experimental techniques as well as some characteristics of the generated radiation are presented.
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Quantum Path Interferences in High-Order Harmonic Generation [PDF]
Physical Review Letters, 2008 We have investigated the intensity dependence of high-order harmonic generation in argon when the two shortest quantum paths contribute to the harmonic emission. For the first time to our knowledge, experimental conditions were found to clearly observe interference between these two quantum paths that are in excellent agreement with theoretical ...
Zair, A +13 more
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High Order Harmonic Generation in Three Pulse Scattering Geometry
EPJ Web of Conferences, 2013 We study the generation of high order harmonics produced by the interaction of three intense and ultrafast noncollinear laser pulses. Harmonic radiation, not overlapped to the direction of the incident pulses, is observed.
Stagira Salvatore +4 more
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High-order harmonic generation from ultrafast matter Talbot effect [PDF]
EPJ Web of ConferencesHigh-order harmonic spectroscopy is a robust method for probing electron dynamics under the influence of a driving field, capturing phenomena as brief as attoseconds.
Plaja Luis +2 more
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Phase of the atomic polarization in high-order harmonic generation [PDF]
Physical Review A, 1995 A recently formulated theory of high-order harmonic generation by low-frequency laser fields [Anne L'Huillier et al., Phys. Rev. A 48, R3433 (1993)] allows us to study the phase of the induced atomic dipole moment. We show that this phase exhibits a piecewise-linear dependence on the laser intensity. This dependence can be interpreted in quasiclassical
Lewenstein, M +2 more
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