Ion yields from strong optical field ionization experiments using 100-femtosecond laser pulses

David N. Fittinghoff; Paul Robert Bolton; Britton Chang; Linn D. Van Woerkom; William E. White

doi:10.1117/12.46139

1 June 1991 Ion yields from strong optical field ionization experiments using 100-femtosecond laser pulses

David N. Fittinghoff, Paul Robert Bolton, Britton Chang, Linn D. Van Woerkom, William E. White

Proceedings Volume 1413, Short-Pulse High-Intensity Lasers and Applications; (1991) https://doi.org/10.1117/12.46139
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

The ultra-fast ionization of argon, krypton and xenon by intense ultra-short laser pulses is studied. Intensities in the range 10¹⁴ to 10¹⁶ W/cm² at a wavelength of 616 nm are provided by a colliding pulse mode-locked dye laser system. To date, ion yields have been monitored using a 1 meter time.of flight spectrometer. Intensity dependent photoelectron signals are deduced from ion data. In an ultra-fast strong field environment, ionization times can be less than an optical period, affording a better distinction between a field ionization picture and a multiphoton ionization picture. For most cases that we study, Keldysh parameters are below 1, indicating that we are in a field ionization regime. As a laser system under development progresses towards the design goal of 1 joule per 100 femtosecond pulse, we will extend these investigations to peak intensities of order 10¹⁸ to 10¹⁹ Watts/cm².

Citation Download Citation

David N. Fittinghoff, Paul Robert Bolton, Britton Chang, Linn D. Van Woerkom, and William E. White "Ion yields from strong optical field ionization experiments using 100-femtosecond laser pulses", Proc. SPIE 1413, Short-Pulse High-Intensity Lasers and Applications, (1 June 1991); https://doi.org/10.1117/12.46139

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