Ellipsometric determination of the electric-field-induced birefringence of photorefractive dyes in a liquid carbazole derivative

E. Hendrickx, B. D. Guenther, Y. Zhang, J. F. Wang, K. Staub, Q. Zhang, S. R. Marder, B. Kippelen, N. Peyghambarian

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

We have used ellipsometric measurements on solutions of 2-dihexylamino-7-dicyanomethylidene-3,4,4a,5,6-pentahydronaphthalene and related polyenes in liquid 9-(2′-ethylhexyl)carbazole to measure the electric-field-induced birefringence at wavelengths of 690 nm and 830 nm. This electric-field-induced birefringence is related to the product of dipole moment squared and the polarizability anisotropy, μ2Δα, and to a large extent determines the dye's photorefractive figure-of-merit (FOM). We show that μ2Δα increases with the conjugation length and report one of the highest μ2Δα values observed so far.

Original languageEnglish (US)
Pages (from-to)407-415
Number of pages9
JournalChemical Physics
Volume245
Issue number1-3
DOIs
StatePublished - Jul 1 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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