Work

Revealing the Cooper minimum of N 2 by Molecular Frame High-Harmonic Spectroscopy

Year: 2012

Type: article

Abstract: Molecular frame high-harmonic spectra of aligned N2 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.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.109.143001

Authors: J. B. Bertrand, H. J. Wörner, P. Hockett, D. M. Villeneuve, P. B. Corkum

Institutions: University of Ottawa, National Research Council Canada, Joint Attosecond Science Laboratory, ETH Zurich, Laboratory of Physical Chemistry

Language: Latvian

Topic: Laser-Matter Interactions and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Natural Sciences and Engineering Research Council of Canada, Air Force Office of Scientific Research

OpenAlex ID: W2316369447

FWCI: 3.515

Cites: 38

Cited by: 72

Related to: 10