Grating-assisted phase matching in extreme nonlinear optics

被引：49

作者：

Cohen, Oren ^{[1
]}

Zhang, Xiaoshi

Lytle, Amy L.

Popmintchev, Tenio

Murnane, Margaret M.

Kapteyn, Henry C.

机构：

[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[2] Univ Colorado, JILA, Boulder, CO 80309 USA

[3] NIST, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.99.053902

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a new technique for phase matching high harmonic generation that can be used for generating bright, tabletop, tunable, and coherent x-ray sources at keV photon energies. A weak quasi-cw counterpropagating field induces a sinusoidal modulation in the phase of the emitted harmonics that can be used for correcting the large plasma-induced phase mismatch. We develop an analytical model that describes this grating-assisted x-ray phase matching and predicts that very modest intensities (< 10(10) W/cm(2)) of quasi-cw counterpropagating fields are required for implementation.

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