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A Scaling Law of Photoelectron Angular Distributions in One-Cycle Laser Pulses |
| BAI Li-Hua;ZHANG Jing-Tao;XU Zhi-Zhan |
| Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 |
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| Cite this article: |
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BAI Li-Hua, ZHANG Jing-Tao, XU Zhi-Zhan 2005 Chin. Phys. Lett. 22 853-856 |
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Abstract The photoelectron angular distributions (PADs) from above-threshold ionization of atoms irradiated by one-cycle laser pulses satisfy a scaling law. The scaling law denotes that the main features of the PADs are determined by four dimensionless parameters: (1) the ponderomotive number up =Up /ħω, the ponderomotive energy Up in units of laser photon energy; (2) the binding number εb =Eb /ħω, the atomic binding energy Eb in units of laser photon energy; (3) the number of absorbed photons q; (4) the carrier-envelope phase Ф0, the phase of the carrier wave with respect to the envelope. We verify the scaling law by theoretical analysis and numerical calculation, compared to that in long-pulse case. A possible experimental test to verify the scaling law is suggested.
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32.80.Rm
42.50.Hz
42.65.Vk
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Published: 01 April 2005
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32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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42.65.Vk
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