Characteristic spectrum of very low-energy photoelectron from above-threshold ionization in the tunneling regime

Characteristic spectrum of very low-energy photoelectron from above-threshold ionization in the tunneling regime

We report an experimental and theoretical study of very low-energy photoelectrons in tunneling ionization process from noble gas atoms interacting with ultrashort intense infrared laser pulses. A universal peak structure with electron energy well below 1 eV in the photoelectron spectrum, correspondi...

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Bibliographic Details
Published in:Physical review letters Vol. 109; no. 4; p. 043001
Main Authors: Wu, C Y, Yang, Y D, Liu, Y Q, Gong, Q H, Wu, M, Liu, X, Hao, X L, Li, W D, He, X T, Chen, J
Format: Journal Article
Language:English
Published: United States 23-07-2012
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Summary:We report an experimental and theoretical study of very low-energy photoelectrons in tunneling ionization process from noble gas atoms interacting with ultrashort intense infrared laser pulses. A universal peak structure with electron energy well below 1 eV in the photoelectron spectrum, corresponding to the double-hump structure in the longitudinal momentum distribution, is identified experimentally for all atomic species. Our quantum and semiclassical analysis reveal the role of long-range Coulomb potential in the production of this very low-energy peak structure.
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content type line 23
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.109.043001