Averaged local field intensities in composite films

Zvi Kotler*, Abraham Nitzan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


The photophysical properties of molecules adsorbed in composite films (e.g. surface island films) depend on the local electromagnetic field within the film. The ratio between the average field intensity 〈|E|2〉 in the film and the intensity |EI|2 associated with the incident field is a measure of the electromagnetic contribution to the surface influence on molecular photophysical phenomena. This ratio depends on the film composition and morphology, on the dielectric properties of the pure components making the film and on the frequency, direction and polarization of the incident radiation. Calculations of this ratio as a function of these parameters for several models of composite films are presented. Image interactions and retardation effects as well as radiative damping and finite size contributions to the dielectric response of the films are taken into account. In addition, an estimate of the field inhomogeneity within the film is obtained by calculating also the ratio 〈|E|2shell/|EI|2 associated with the field in thin shells surrounding the dielectric particles which constitute the film.

Original languageEnglish
Pages (from-to)124-154
Number of pages31
JournalSurface Science
Issue number1
StatePublished - 2 Jul 1983


FundersFunder number
Commission for Basic Research of the Israel Academy of Science
United States-Israel Binational Science Foundation


    Dive into the research topics of 'Averaged local field intensities in composite films'. Together they form a unique fingerprint.

    Cite this