Observation of correlated electronic decay in expanding clusters triggered by near-infrared fields

B. Schütte (), M. Arbeiter, T. Fennel (), G. Jabbari, A.I. Kuleff (), M.J.J. Vrakking and A. Rouzée
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B. Schütte: Max-Born-Institut
M. Arbeiter: Institut für Physik, Universität Rostock
T. Fennel: Institut für Physik, Universität Rostock
G. Jabbari: Theoretische Chemie, PCI, Universität Heidelberg
A.I. Kuleff: Theoretische Chemie, PCI, Universität Heidelberg
M.J.J. Vrakking: Max-Born-Institut
A. Rouzée: Max-Born-Institut

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract When an excited atom is embedded into an environment, novel relaxation pathways can emerge that are absent for isolated atoms. A well-known example is interatomic Coulombic decay, where an excited atom relaxes by transferring its excess energy to another atom in the environment, leading to its ionization. Such processes have been observed in clusters ionized by extreme-ultraviolet and X-ray lasers. Here, we report on a correlated electronic decay process that occurs following nanoplasma formation and Rydberg atom generation in the ionization of clusters by intense, non-resonant infrared laser fields. Relaxation of the Rydberg states and transfer of the available electronic energy to adjacent electrons in Rydberg states or quasifree electrons in the expanding nanoplasma leaves a distinct signature in the electron kinetic energy spectrum. These so far unobserved electron-correlation-driven energy transfer processes may play a significant role in the response of any nano-scale system to intense laser light.

Date: 2015
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DOI: 10.1038/ncomms9596

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