Ablation of metal particles by surface plasmon excitation with laser light

  • Small sodium particles supported on an insulating LiF crystal are illuminated with visible light of an Ar+ or Kr+ laser. As a result the emission of neutral metal atoms from the particle surface is observed. the strongly resonant character of this emission, centered at about 490 nm, indicates that a surface plasmon excitation precedes the ejection. Time-of-flight measurements show large mean velocities of the emitted atoms. Continued laser illumination of the metal particles leads to an ablationSmall sodium particles supported on an insulating LiF crystal are illuminated with visible light of an Ar+ or Kr+ laser. As a result the emission of neutral metal atoms from the particle surface is observed. the strongly resonant character of this emission, centered at about 490 nm, indicates that a surface plasmon excitation precedes the ejection. Time-of-flight measurements show large mean velocities of the emitted atoms. Continued laser illumination of the metal particles leads to an ablation of typically 20% of the initial coverage. The process is explained by a nonthermal mechanismshow moreshow less

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Metadaten
Author:W. Hoheisel, U. Schulte, Michael Vollmer, R. Weidenauer, F. Träger
Parent Title (English):In: Applied Surface Science Vol. 36 (1989) 1–4, pp 664–672
Document Type:Article
Language:English
Year of Publishing:1989
Date of Publication (online):2014/01/13
Release Date:2014/01/13
First Page:664
Last Page:672
Dewey Decimal Classification:Naturwissenschaften und Mathematik / Physik / Physik
University Bibliography:Hochschulbibliographie
Licence (German):Creative Commons - Namensnennung, Nicht kommerziell, Keine Bearbeitung