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Bermel PA, Warner M. Photonic band structure of cholesteric elastomers. Phys Rev E Stat Nonlin Soft Matter Phys. 2002;65(5):056614doi: 10.1103/PhysRevE.65.056614.
Bermel, P. A., & Warner, M. (2002). Photonic band structure of cholesteric elastomers. Physical review. E, Statistical, nonlinear, and soft matter physics, 65(5), 056614. https://doi.org/10.1103/PhysRevE.65.056614
Bermel, P A, and Warner, M. "Photonic band structure of cholesteric elastomers." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 65,5 (2002): 056614. doi: https://doi.org/10.1103/PhysRevE.65.056614
Bermel PA, Warner M. Photonic band structure of cholesteric elastomers. Phys Rev E Stat Nonlin Soft Matter Phys. 2002 May;65(5):056614. doi: 10.1103/PhysRevE.65.056614. Epub 2002 May 16. PMID: 12059738.
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Phys Rev E Stat Nonlin Soft Matter Phys. 2002 May;65(5):056614. doi: 10.1103/PhysRevE.65.056614. Epub 2002 May 16.

Photonic band structure of cholesteric elastomers.

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

P A Bermel, M Warner

Affiliations

  1. Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom.

PMID: 12059738 DOI: 10.1103/PhysRevE.65.056614

Abstract

We calculate the photonic band structure along and oblique to the helix axis of cholesteric elastomers. They are highly deformable, self-assembling systems. They display brilliantly colored reflections and lasing owing to stop bands in their photonic band structure. This band structure varies sensitively and extensively with strain. We show how additional stop bands open up and how they all shift in frequency. We predict a "total" stop band, that is, for both circular polarizations and show analytically how stop bands scale with strain. The extension of stop bands to a range of angles thereby creates pseudogaps, and the relevance to low-threshold lasing is discussed.

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