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Zografopoulos DC, Kriezis EE, Mitov M, et al. Theoretical and experimental optical studies of cholesteric liquid crystal films with thermally induced pitch gradients. Phys Rev E Stat Nonlin Soft Matter Phys. 2006;73(6):061701doi: 10.1103/PhysRevE.73.061701.
Zografopoulos, D. C., Kriezis, E. E., Mitov, M., & Binet, C. (2006). Theoretical and experimental optical studies of cholesteric liquid crystal films with thermally induced pitch gradients. Physical review. E, Statistical, nonlinear, and soft matter physics, 73(6), 061701. https://doi.org/10.1103/PhysRevE.73.061701
Zografopoulos, Dimitrios C, et al. "Theoretical and experimental optical studies of cholesteric liquid crystal films with thermally induced pitch gradients." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 73,6 (2006): 061701. doi: https://doi.org/10.1103/PhysRevE.73.061701
Zografopoulos DC, Kriezis EE, Mitov M, Binet C. Theoretical and experimental optical studies of cholesteric liquid crystal films with thermally induced pitch gradients. Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Jun;73(6):061701. doi: 10.1103/PhysRevE.73.061701. Epub 2006 Jun 06. PMID: 16906843.
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Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Jun;73(6):061701. doi: 10.1103/PhysRevE.73.061701. Epub 2006 Jun 06.

Theoretical and experimental optical studies of cholesteric liquid crystal films with thermally induced pitch gradients.

Physical review. E, Statistical, nonlinear, and soft matter physics

Dimitrios C Zografopoulos, Emmanouil E Kriezis, Michel Mitov, Corinne Binet

Affiliations

  1. Department of Electrical and Computer Engineering, Aristotle University of Thessaloniki, Thessaloniki GR-54124, Greece.

PMID: 16906843 DOI: 10.1103/PhysRevE.73.061701

Abstract

The reflection properties of cholesteric films with thermally induced pitch gradients are theoretically and experimentally studied. It is shown that the optical behavior of such films corresponds to the averaged contribution of a number of stochastic pitch variation profiles, due to the transversal and longitudinal nonuniformities that develop in the helical structure of such samples. Depending on the annealing time, both narrow-band and broadband behavior can be selectively achieved. The influence of the pitch profile gradient on the broadband reflection performance of cholesteric samples is theoretically analyzed, and a multi-slab structure for achieving optimum efficiency is proposed.

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