Research on Strong-Field Processes in the Ultraviolet Region
The recent interest in the study of atoms in strong laser fields grew naturally with the availability of intense laser sources. Since the first widely available intense laser was the Nd3+:glass or Nd: YAG system, this has remained the main workhorse for many experiments in the easily obtainable intensity range 1013–1014 W cm−2 (Ref. 1). Increasing the intensity of this laser is not simple, due to the self-focusing limit of the solid-state amplifying material. A method to overcome this limit has recently been developed,2 where a chirped pulsed is amplified and then recompressed to give a short, intense pulse.
KeywordsMultiphoton Ionization Focal Intensity Kinetic Energy Distribution Multiphoton Excitation Charge Displacement
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