Phys. Rev. Lett. 62, 1259–1262 (1989)Above-threshold ionization in the long-wavelength limitReceived 28 September 1988; published in the issue dated 13 March 1989 In the long-wavelength limit, above-threshold ionization (ATI) is primarily the result of the interaction of a newly freed electron with the laser field. Classical physics requires that linearly and circularly polarized light produce very different ATI spectra. Measurements performed using both linearly and circularly polarized, picosecond, 10-μm pulses confirm these conclusions. © 1989 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.62.1259
DOI:
10.1103/PhysRevLett.62.1259
PACS:
32.80.-t
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