Scaling Laws of the Two-Electron Sum-Energy Spectrum in Strong-Field Double Ionization

被引：72

作者：

Ye, Difa ^{[1
]}

Li, Min ^{[2
,3
,4
]}

Fu, Libin ^{[1
,5
,6
]}

Liu, Jie ^{[1
,5
,6
,7
]}

Gong, Qihuang ^{[2
,3
,4
]}

Liu, Yunquan ^{[2
,3
,4
]}

Ullrich, J. ^{[8
,9
]}

机构：

[1] Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China

[2] Peking Univ, Dept Phys, Beijing 100871, Peoples R China

[3] Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

[4] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

[5] Peking Univ, HEDPS, CAPT, Beijing 100871, Peoples R China

[6] Peking Univ, IFSA Collaborat Innovat Ctr MoE, Beijing 100871, Peoples R China

[7] China Acad Engn Phys, Ctr Fus Energy Sci & Technol, Beijing 100088, Peoples R China

[8] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[9] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 12期

关键词：

ABOVE-THRESHOLD-IONIZATION; ATOMS; RESCATTERING; PLATEAU; HELIUM;

D O I：

10.1103/PhysRevLett.115.123001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The sum-energy spectrum of two correlated electrons emitted in nonsequential strong-field double ionization (SFDI) of Ar was studied for intensities of 0.3 to 2 x 10(14) W/cm(2). We find the mean sum energy, the maximum of the distributions as well as the high-energy tail of the scaled (to the ponderomotive energy) spectra increase with decreasing intensity below the recollision threshold (BRT). At higher intensities the spectra collapse into a single distribution. This behavior can be well explained within a semiclassical model providing clear evidence of the importance of multiple recollisions in the BRT regime. Here, ultrafast thermalization between both electrons is found occurring within three optical cycles only and leaving its clear footprint in the sum-energy spectra.

引用

页数：5

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