Quantum path interference in the wavelength dependence of high-harmonic generation

We investigate the dependence of the intensity of radiation due to high-harmonic generation as a function of the wavelength lambda of the fundamental driver field. Superimposed on a smooth power-law dependence observed previously, we find surprisingly strong and rapid fluctuations on a fine lambda s...

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Bibliographic Details
Published in:Physical review letters 2007-12, Vol.99 (25), p.253903-253903, Article 253903
Main Authors: Schiessl, K, Ishikawa, K L, Persson, E, Burgdörfer, J
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
FLUCTUATIONS
FREQUENCY DEPENDENCE
HARMONIC GENERATION
INTERFERENCE
ORBITS
QUANTUM MECHANICS
WAVELENGTHS
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Summary:We investigate the dependence of the intensity of radiation due to high-harmonic generation as a function of the wavelength lambda of the fundamental driver field. Superimposed on a smooth power-law dependence observed previously, we find surprisingly strong and rapid fluctuations on a fine lambda scale. We identify the origin of these fluctuations in terms of quantum path interferences with up to five returning orbits significantly contributing.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.99.253903