We utilize the dispersion property of an X-ray filter material for the generation of a single sub-50-as pulse from high-order harmonics. The attosecond pulse, formed by selecting the spectral range of high-order harmonic radiation, contains an intrinsic chirp corresponding to the quadratic phase variation during a half cycle of a laser pulse. We show that this chirp can be compensated by using the negative group-delay dispersion of a thin X-ray filter, compressing the attosecond pulse down to sub-50-as.

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dc.contributor.authorKim, K.T.
dc.contributor.authorKim, C.M.
dc.contributor.authorBaik, M.G.
dc.contributor.authorUmesh, G.
dc.contributor.authorNam, C.H.
dc.date.accessioned2026-02-05T11:00:19Z
dc.date.issuedCompression of harmonie pulses by using material dispersion
dc.description.abstract2004
dc.identifier.citationApplied Physics B: Lasers and Optics, 2004, 79, 5, pp. 563-567
dc.identifier.issn9462171
dc.identifier.urihttps://doi.org/10.1007/s00340-004-1601-8
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/27937
dc.subjectCoherent light
dc.subjectComputational methods
dc.subjectDispersions
dc.subjectHarmonic generation
dc.subjectIonization
dc.subjectLaser mode locking
dc.subjectMaterials science
dc.subjectPhotons
dc.subjectAttosecond pulses
dc.subjectHarmonic radiation
dc.subjectTime-dependent Schrödinger equations (TDSE)
dc.subjectX-ray filters
dc.subjectFiber lasers
dc.titleWe utilize the dispersion property of an X-ray filter material for the generation of a single sub-50-as pulse from high-order harmonics. The attosecond pulse, formed by selecting the spectral range of high-order harmonic radiation, contains an intrinsic chirp corresponding to the quadratic phase variation during a half cycle of a laser pulse. We show that this chirp can be compensated by using the negative group-delay dispersion of a thin X-ray filter, compressing the attosecond pulse down to sub-50-as.

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