High-order harmonic generation in helium: A comparison study

被引：0

作者：

Bondy, A. T. ^{[1
,2
]}

Saha, S. ^{[2
,3
]}

del Valle, J. C. ^{[2
]}

Harth, A. ^{[4
]}

Douguet, N. ^{[5
]}

Hamilton, K. R. ^{[6
]}

Bartschat, K. ^{[2
]}

机构：

[1] Univ Windsor, Dept Phys, Windsor, ON N9B 3P4, Canada

[2] Drake Univ, Dept Phys & Astron, Des Moines, IA 50311 USA

[3] Panskura Banamali Coll Autonomous, Dept Phys, Panskura 721152, W Bengal, India

[4] Aalen Univ, Ctr Opt Technol, D-73430 Aalen, Germany

[5] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA

[6] Univ Colorado, Dept Phys, Denver, CO 80204 USA

来源：

PHYSICAL REVIEW A | 2024年 / 109卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Cutoff frequency - Harmonic generation;

D O I：

10.1103/PhysRevA.109.043113

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a detailed study of high-order harmonic generation (HHG) in helium. When comparing predictions from a single-active-electron model with those from all-electron simulations, such as the ATTOMESA code and R-matrix-with-time-dependence method, which can include different numbers of states in the close-coupling expansion, it seems imperative to generate absolute numbers for the HHG spectrum in a well-defined framework. While qualitative agreement in the overall frequency dependence of the spectrum, including the cutoff frequency predicted by a semiclassical model, can be achieved by many models in arbitrary units, only absolute numbers can be used for benchmark comparisons between different approaches.

引用

页数：9

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