2011
DOI: 10.1103/physrevlett.106.023001
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Ultrahigh-Order Wave Mixing in Noncollinear High Harmonic Generation

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Cited by 123 publications
(135 citation statements)
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“…2(b), a clear harmonic emission is observed only when the three pulses are overlapped in time; very weak harmonics can be also detected for positive delays and are attributed to the plasma grating induced by the fixed pulses. The observation of several harmonics demostrates that harmonic emission is not spectrally dispersed as reported in other studies [3,4]. The peak position of the harmonics as well as their width slightly change with the delay; such behavior, that is still under investigation, could be attributed to the effect of ionization or to volume effects related to the spatio-temporal evolution of the interference among the beams in the gaseous medium.…”
Section: Resultssupporting
confidence: 81%
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“…2(b), a clear harmonic emission is observed only when the three pulses are overlapped in time; very weak harmonics can be also detected for positive delays and are attributed to the plasma grating induced by the fixed pulses. The observation of several harmonics demostrates that harmonic emission is not spectrally dispersed as reported in other studies [3,4]. The peak position of the harmonics as well as their width slightly change with the delay; such behavior, that is still under investigation, could be attributed to the effect of ionization or to volume effects related to the spatio-temporal evolution of the interference among the beams in the gaseous medium.…”
Section: Resultssupporting
confidence: 81%
“…The harmonic radiation has been studied as a function of the delay between the three pulses in several gases (xenon, krypton, argon). According to energy and momentum conservation laws [3], the directions of emitted harmonics with respect to the three driving beams should behave as reported in Fig. 1.…”
Section: Experimental Setup and Theoretical Predictionsmentioning
confidence: 93%
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“…Moreover, the emitted harmonics can be spatially separated from the fundamental driving laser beams [34][35][36], allowing samples to be placed close to the generation region, where the harmonic fluence is high, without being damaged by the driving laser. Previous investigations of noncollinear HHG have also probed the nonlinear optics of the HHG process [37] and shown that this is a promising geometry for cavity-assisted HHG [38][39][40]. Other work has used the noncollinear geometry to produce spectrally narrow EUV light [41] and applied a noncollinear probe beam to spatially and temporally characterize attosecond pulses [42].…”
Section: Introductionmentioning
confidence: 99%