High-Order Harmonic Generation in Atom Clusters
T. D. DonnellyDepartment of Physics, University of California at Berkeley, Berkeley, California 94720T. DitmireLawrence Livermore National Laboratory, P.O. Box 808, L-443, Livermore, California 94550Keir C. NeumanDepartment of Physics, University of California at Berkeley, Berkeley, California 94720M. D. PerryLawrence Livermore National Laboratory, P.O. Box 808, L-443, Livermore, California 94550R. W. FalconeDepartment of Physics, University of California at Berkeley, Berkeley, California 94720
1996en
ABI
Annotatsiya
We report the generation of short-wavelength, high-order harmonics of intense laser radiation from atom clusters. Clusters containing about 1${0}^{3}$ atoms are produced in a high-pressure gas jet. We show them to be a unique nonlinear medium. Compared with monomer gases they yield a higher appearance intensity for a given harmonic order, stronger nonlinear dependence of harmonic signal on laser intensity, higher-order harmonics, and reduced saturation of the harmonic signal at high laser intensity.
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