Phase matching of high-order harmonics in hollow waveguides

被引：306

作者：

Durfee, CG ^{[1
]}

Rundquist, AR ^{[1
]}

Backus, S ^{[1
]}

Herne, C ^{[1
]}

Murnane, MM ^{[1
]}

Kapteyn, HC ^{[1
]}

机构：

[1] Univ Michigan, Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.83.2187

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the phase matching of a high-harmonic generation by intense, 20 fs laser pulses in a gas-filled capillary waveguide. We identify several regimes in which the harmonic field can build up coherently: a balance of atomic and waveguide dispersions, noncollinear Cerenkov phase matching, and a balance of atomic and plasma dispersions. The role of atomic dispersion is examined by measuring and calculating the harmonic signal for several gases. We also predict and provide preliminary evidence for a regime where phase matching occurs only at specific fractional ionization levels, where the harmonic signal is sensitive to the absolute phase of the carrier wave.

引用

页码：2187 / 2190

页数：4

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