Anomalous differential polarized phase angles for two-photon excitation with isotropic depolarizing rotations

Joseph R. Lakowicz, Ignacy Gryczynski, Eva Danielsen

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

We describe frequency-domain measurements of the anisotropy decay of 1,6-diphenylhexatriene resulting from one- and two-photon excitation. For two-photon excitation, the phase shifts (Δ) between the horizontally and vertically polarized components of the decay exceed the absolute maximum of 30° possible for one-photon excitation, and values of Δ as large as 37° were observed for 1,6-diphenylhexatriene in triacetin. These results are explained by the increased orientation of the photoselected population for two- as compared to one-photon excitation.

Original languageEnglish
Pages (from-to)47-53
Number of pages7
JournalChemical Physics Letters
Volume191
Issue number1-2
DOIs
StatePublished - 27 Mar 1992

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