Abstract
Phase matching is indispensible for the efficient generation high-order harmonic radiation (HHG), especially in the range of several-100-eV. Recently it has been theoretically predicted that perfect pressure induced phase matching cannot be realized in helium in the 0.2-1 keV spectral range using 800 nm light pulses [1]. In this contribution we present a detailed experimental study of the phase mismatch for the first time and derive guidelines for maximizing the short wavelength signal without perfect phase matching.
© 2013 IEEE
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