Ultrafast Plasmon Dynamics in Crystalline LiF Triggered by Intense Extreme UV Pulses.

Fasolato, C; Sacchetti, F; Postorino, P; Tozzi, P; Principi, E; Simoncig, A; Foglia, L; Mincigrucci, R; Bencivenga, F; Masciovecchio, C; Petrillo, C

Fasolato, C; Sacchetti, F; Postorino, P; Tozzi, P; Principi, E; Simoncig, A; Foglia, L; Mincigrucci, R; Bencivenga, F; Masciovecchio, C; Petrillo, C.

Afiliación

Fasolato C; Università di Perugia, Dipartimento di Fisica e Geologia, I-06123 Perugia, Italy.
Sacchetti F; Università di Perugia, Dipartimento di Fisica e Geologia, I-06123 Perugia, Italy.
Postorino P; CNR Istituto Officina dei Materiali (IOM), I-06123 Perugia, Italy.
Tozzi P; CNR Istituto Officina dei Materiali (IOM), I-06123 Perugia, Italy.
Principi E; Università di Roma Sapienza, Dipartimento di Fisica, I-00100 Roma, Italy.
Simoncig A; CNR Istituto Officina dei Materiali (IOM), I-06123 Perugia, Italy.
Foglia L; Elettra-Sincrotrone Trieste SCpA, I-34149 Basovizza, Trieste, Italy.
Mincigrucci R; Elettra-Sincrotrone Trieste SCpA, I-34149 Basovizza, Trieste, Italy.
Bencivenga F; Elettra-Sincrotrone Trieste SCpA, I-34149 Basovizza, Trieste, Italy.
Masciovecchio C; Elettra-Sincrotrone Trieste SCpA, I-34149 Basovizza, Trieste, Italy.
Petrillo C; Elettra-Sincrotrone Trieste SCpA, I-34149 Basovizza, Trieste, Italy.

Phys Rev Lett ; 124(18): 184801, 2020 May 08.

Article en En | MEDLINE | ID: mdl-32441964

RESUMEN

An extreme ultraviolet pump and visible-light probe transmission experiment in crystalline LiF, carried out at the Free Electron Laser facility FERMI, revealed an oscillating time dependence of the plasmon mode excited in the high-density high-temperature electron plasma. The effect is interpreted as a fingerprint of the electron-ion interaction: the ion motion, shaped by the electron dynamic screening, induces, in turn, electron density fluctuations that cause the oscillation of the plasmon frequency at the timescale of the ion dynamics. Fitting the high resolution transmission data with an RPA model for the temperature-dependent dielectric function, which includes electron self-energy and electron-ion coupling, confirms the interpretation of the time modulation of the plasmon mode.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2020 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Estados Unidos

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