Cholesteric Mixtures with Photochemically Tunable, Circularly Polarized Fluorescence


  • This research was supported by the Russian Foundation of Fundamental Research (grant 02-03-33048), the Russian Research Program “Universities of Russia”, and partially by CRDF (contract RC2-539). The authors thank Mr. Armin Bayer and Arndt Reuning for technical assistance. A.B. gratefully acknowledges the research fellowship provided by the Alexander von Humboldt Foundation.


Photo-patternable cholesteric materials that combine fluorescence and a photochemically variable helical pitch have been investigated. Two cholesteric mixtures containing chiral photochromic (see Figure) as well as fluorescent dopants are examined. It is shown that photoregulation of both the fluorescence intensity and the polarization state of the emitted light can be realized.