Revealing the Cooper minimum of N2 by Molecular Frame High-Harmonic Spectroscopy

被引：64

作者：

Bertrand, J. B. ^{[1
,2
]}

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

Hockett, P. ^{[1
,2
]}

Villeneuve, D. M. ^{[1
,2
]}

Corkum, P. B. ^{[1
,2
]}

机构：

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

[2] Univ Ottawa, Ottawa, ON K1A 0R6, Canada

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

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 14期

基金：

加拿大自然科学与工程研究理事会;

关键词：

MULTIELECTRON DYNAMICS; PHOTOIONIZATION; INTERFEROMETRY; INTERFERENCE; GENERATION; ORBITALS;

D O I：

10.1103/PhysRevLett.109.143001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Molecular frame high-harmonic spectra of aligned N-2 molecules reveal a Cooper-like minimum. By deconvolving the laboratory frame alignment distribution, what was previously thought to be a maximum of emission along the molecular axis is found to be maxima at 35 degrees off axis, with a spectral minimum on axis. Both of these features are supported by photoionization calculations that underline the relationship between high-harmonic spectroscopy and photoionization measurements. The calculations reveal that the on axis spectral minimum is a Cooper-like minimum that arises from the destructive interference of the p and f partial wave contributions to high-harmonic photorecombination. Features such as Cooper minima and shape resonances are ubiquitous in molecular photoionization or recombination.

引用

页数：5

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