A Scaling Law of Photoelectron Angular Distributions in One-Cycle Laser Pulses

作     者：白丽华 张敬涛 徐至展 

作者机构：LaboratoryforHighIntensityOpticsShanghaiInstituteofOpticsandFineMechanicsChineseAcademyofSciencesShanghai201800 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2005年第22卷第4期

页      面：853-856页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

基　　金：国家973计划 国家自然科学基金 

主　　题：IONIZATION 

摘      要：The photoelectron angular distributions (PADs) from above-thresholdionization of atoms irradiated by one-cycle laser pulses satisfy a scaling law. The scaling lawdenotes that the main features of the PADs are determined by four dimensionless parameters: (1) theponderomotive number u(p) = U-p/hw, the ponderomotive energy U-p in units of laser photon energy;(2) the binding number E-b = E-b/h(w), the atomic binding energy E-b in units of laser photonenergy; (3) the number of absorbed photons q; (4) the carrier-envelope phase phi(0), the phase ofthe carrier wave with respect to the envelope. We verify the scaling law by theoretical analysis andnumerical calculation, compared to that in long-pulse case. A possible experimental test to verifythe scaling law is suggested.