Ponderomotive streaking of the ionization potential as a method for measuring pulse durations in the XUV domain with fs resolution
نویسندگان
چکیده
We present an alternative method for measuring ultrashort extreme-ultraviolet pulses that can be synchronized with an intense infrared pulse. The method, based on photoionization of a target atom by the extremeultraviolet pulse in the presence of the infrared pulse, has a potential accuracy of close to 1 fs and is susceptible to single-shot operation. It is demonstrated on harmonic 15 of a titanium:sapphire laser. The minimum pulse duration that can be measured is limited only by the frequency of the radiation used for the ponderomotive shift of the ionization potential ~3 fs in the case of the titanium:sapphire fundamental!.
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