Double Ionization by Strong Elliptically Polarized Laser Pulses
نویسنده
چکیده
Observations of double ionization by femtosecond-scale near-optical laser pulses with intensities above about 10W/cm revealed a prominent surprising feature. The doubly ionized ion count, as a function of incident laser intensity, was observed to be significantly above the value predicted by the famous ADK ionization formula [1], which is used to describe non-correlated tunneling escape of two electrons in sequence. The presumption is then natural that a strongly correlated ionization channel has become open. The ADK formula and its predecessors [2, 3] are well matched by experimental facts for single ionization so it was startling to find them violated for high-field double ionization. Recent overviews of this domain of laser-atom physics are given by Agostini and DiMauro [4] and Becker and Rottke [5].
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