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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页数：4
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