Charge injection asymmetry: A new route to strong optical nonlinearity in poled polymers

Shlomo Yitzchaik*, Garry Berkovic, Valeri Krongauz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Amorphous polymer films containing hyperpolarizable dye molecules are poled by an electric field applied parallel to the plane of the thin film. The resultant second harmonic generation is much stronger than predicted by the standard model of dipolar interactions, and furthermore indicates asymmetry both parallel and perpendicular to the poling field. These results are attributed to a new, efficient mechanism for the production of optical nonlinearity in poled films in which asymmetric charge injection into the polymer and its trapping by dye species sets up a charge gradient perpendicular to the direction of the external poling field.

Original languageAmerican English
Pages (from-to)3949-3951
Number of pages3
JournalJournal of Applied Physics
Volume70
Issue number7
DOIs
StatePublished - 1991
Externally publishedYes

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