Effects of phase-matching on high-order harmonic generation from aligned N2

被引：6

作者：

Sickmiller, Brett A. ^{[1
]}

Jones, R. R. ^{[1
]}

机构：

[1] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA

来源：

PHYSICAL REVIEW A | 2009年 / 80卷 / 03期

关键词：

INTERFERENCE; MOLECULES;

D O I：

10.1103/PhysRevA.80.031802

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have examined high-order harmonic generation from transiently aligned room-temperature N-2 molecules in a hollow-core waveguide. We identify alignment-dependent propagation effects which can mask the single-molecule response. In particular, we observe an intensity-dependent reversal in the harmonic efficiency from parallel to perpendicular alignment. The reversal can be attributed to the alignment dependence of the tunneling ionization rate and the concomitant modification of the phase-matching conditions due to the changes in the free-electron density in the fiber.

引用

页数：4

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