Cluster effects in high-order harmonics generated by ultrashort light pulses
C. VozziNational Laboratory for Ultrafast and Ultraintense Optical Science , INFM, Dipartimento di Fisica, Politecnico, Milano, ItalyM. NisoliNational Laboratory for Ultrafast and Ultraintense Optical Science , INFM, Dipartimento di Fisica, Politecnico, Milano, ItalyJ-P. CaumesNational Laboratory for Ultrafast and Ultraintense Optical Science , INFM, Dipartimento di Fisica, Politecnico, Milano, ItalyG. SansoneNational Laboratory for Ultrafast and Ultraintense Optical Science , INFM, Dipartimento di Fisica, Politecnico, Milano, ItalyS. StagiraNational Laboratory for Ultrafast and Ultraintense Optical Science , INFM, Dipartimento di Fisica, Politecnico, Milano, ItalyS. De SilvestriNational Laboratory for Ultrafast and Ultraintense Optical Science , INFM, Dipartimento di Fisica, Politecnico, Milano, ItalyM. VecchiocattiviUniversità degli Studi di Trento INFM, Dipartimento di Fisica, Facoltà di Scienze, , Trento, ItalyDavide BassiUniversità degli Studi di Trento INFM, Dipartimento di Fisica, Facoltà di Scienze, , Trento, ItalyM. PascoliniUniversità di Padova Laboratory for Ultraviolet and X-Ray Optical Research, INFM D.E.I., , Padova, ItalyLuca PolettoUniversità di Padova Laboratory for Ultraviolet and X-Ray Optical Research, INFM D.E.I., , Padova, ItalyPaolo VilloresiUniversità di Padova Laboratory for Ultraviolet and X-Ray Optical Research, INFM D.E.I., , Padova, ItalyG. TondelloUniversità di Padova Laboratory for Ultraviolet and X-Ray Optical Research, INFM D.E.I., , Padova, Italy
2005en
ABI
Abstract
High-order harmonic generation in argon driven by 25-fs-light pulses is investigated from the gaseous to the cluster regime. The harmonic cutoff observed in presence of clusters shows a considerable extension with respect to the gaseous phase. Harmonic spectra are investigated as a function of cluster size, showing the existence of an optimal cluster dimension, which maximizes the harmonic photon yield.
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