Ultrahigh-Order Wave Mixing in Noncollinear High Harmonic Generation

被引：117

作者：

Bertrand, J. B. ^{[1
]}

Woerner, H. J. ^{[1
,3
]}

Bandulet, H. -C. ^{[2
]}

Bisson, E. ^{[2
]}

Spanner, M. ^{[1
]}

Kieffer, J. -C. ^{[2
]}

Villeneuve, D. M. ^{[1
]}

Corkum, P. B. ^{[1
]}

机构：

[1] Joint Attosecond Sci Lab, Ottawa, ON K1A 0R6, Canada

[2] Inst Natl Rech Sci, Varennes, PQ J3X 1S2, Canada

[3] ETH, Phys Chem Lab, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

ATTOSECOND PULSES; FIELD; SUM;

D O I：

10.1103/PhysRevLett.106.023001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that noncollinear high harmonic generation (HHG) can be fully understood in terms of nonlinear optical wave mixing. We demonstrate this by superposing on the fundamental omega(1) field its second harmonic omega(2) of variable intensity in a noncollinear geometry. It allows us to identify, by momentum conservation, each field's contribution (n(1,) n(2)) to the extreme ultraviolet emission at frequency Omega = n(1)omega(1) + n(2)omega(2). We observe that the photon (Omega) yield follows an n(2) power law on the omega(2) intensity, before saturation. It demonstrates that, although HHG is a highly nonperturbative process, a perturbation theory can still be developed around it.

引用

页数：4

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