In situ determination of induced dipole moments of pure and membrane-bound retinal chromophores

Th Rasing*, Jung Y. Huang, A. Lewis, T. Stehlin, Y. R. Shen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

By using the technique of optical second-harmonic generation, we have succeeded in obtaining the orientation, spectrum, and the change in dipole moment upon optical excitation for monolayers of retinal chromophores, which are of relevance for visual excitation. The change in dipole moment of the chromophore embedded in the purple membrane of Halobacterium halobium is found to be identical to that of the free chromophore. The spectrum of all-trans retinal monolayers exhibits a subsidiary one-photon forbidden peak in addition to the main absorption peak.

Original languageEnglish
Pages (from-to)1684-1687
Number of pages4
JournalPhysical Review A
Volume40
Issue number3
DOIs
StatePublished - 1 Jan 1989

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