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Issue 19, 2011
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Time-resolved analysis of strong-field induced plasmon oscillations in metal clusters by spectral interferometry with few-cycle laser fields

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Abstract

We propose a scheme for ultrafast real-time imaging of laser-induced collective electron oscillations (Mie plasmons) in gas phase metal clusters by interferometrically stable scanning of two intense few-cycle optical laser pulses. The feasibility of our nonlinear spectral interferometry method with experimentally accessible observables is tested in a theoretical case study on simple-metal clusters (Na147). The results show that the plasmon period and lifetime as well as the phase and relative amplitude of the collective electron motion can be extracted with sub-fs resolution. The access to nonlinear response effects, as the demonstrated increase of the plasmon lifetime with laser intensity due to ionization-induced contraction of the electron cloud, opens up vast opportunities for interrogating ultrafast many-particle dynamics in nanosystems under strong laser fields with unprecedented resolution.

Graphical abstract: Time-resolved analysis of strong-field induced plasmon oscillations in metal clusters by spectral interferometry with few-cycle laser fields

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Publication details

The article was received on 01 Nov 2010, accepted on 14 Jan 2011 and first published on 17 Feb 2011


Article type: Paper
DOI: 10.1039/C0CP02344B
Citation: Phys. Chem. Chem. Phys., 2011,13, 8747-8754
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    Time-resolved analysis of strong-field induced plasmon oscillations in metal clusters by spectral interferometry with few-cycle laser fields

    J. Köhn and T. Fennel, Phys. Chem. Chem. Phys., 2011, 13, 8747
    DOI: 10.1039/C0CP02344B

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