Femtosecond trapping of free electrons in ultrathin films of NaCl on Ag(100)

David E. Suich, Benjamin W. Caplins, Alex J. Shearer, Charles B. Harris

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We report the excited-state electron dynamics for ultrathin films of NaCl on Ag(100). The first three image potential states (IPSs) were initially observed following excitation. The electrons in the spatially delocalized n = 1 IPS decayed on the ultrafast time scale into multiple spatially localized states lower in energy. The localized electronic states are proposed to correspond to electrons trapped at defects in the NaCl islands. Coverage and temperature dependence of the localized states support the assignment to surface trap states existing at the NaCl/vacuum interface. These results highlight the importance of electron trapping in ultrathin insulating layers. SECTION: Surfaces, Interfaces, Porous Materials, and Catalysis

Original languageEnglish (US)
Pages (from-to)3073-3077
Number of pages5
JournalJournal of Physical Chemistry Letters
Issue number17
StatePublished - Sep 4 2014

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© 2014 American Chemical Society.


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