High harmonic generation beyond the electric dipole approximation

被引：130

作者：

Walser, MW

Keitel, CH

Scrinzi, A

Brabec, T

机构：

[1] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany

[2] Vienna Univ Technol, Inst Photon, A-1040 Vienna, Austria

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.85.5082

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A generalization of the analytical theory of high harmonic generation in the long wavelength limit and in the single active electron approximation is; developed taking into account the magnetic dipole and electric quadrupole interaction. Quantum mechanical and classical theories are found to be in excellent agreement, which allows one to explain the influence of multipole effects in terms of an intuitive picture. For Ti:S lasers (0.8 mum) multipole contributions are found to be small below an intensity of about 10(17) W/cm(2), at which harmonic radiation with photon energies of several keV is generated. This promises the extension of high harmonic generation well into the sub-nm wavelength regime.

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页码：5082 / 5085

页数：4

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