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Spontaneous helix formation in non-chiral bent-core liquid crystals with fast linear electro-optic effect

Author

Listed:
  • Sithara P. Sreenilayam

    (Trinity College Dublin, The University of Dublin)

  • Yuri P. Panarin

    (Trinity College Dublin, The University of Dublin
    School of Electrical and Electronic Engineering, Dublin Institute of Technology)

  • Jagdish K. Vij

    (Trinity College Dublin, The University of Dublin)

  • Vitaly P. Panov

    (Trinity College Dublin, The University of Dublin)

  • Anne Lehmann

    (Martin Luther University Halle-Wittenberg)

  • Marco Poppe

    (Martin Luther University Halle-Wittenberg)

  • Marko Prehm

    (Martin Luther University Halle-Wittenberg)

  • Carsten Tschierske

    (Martin Luther University Halle-Wittenberg)

Abstract

Liquid crystals (LCs) represent one of the foundations of modern communication and photonic technologies. Present display technologies are based mainly on nematic LCs, which suffer from limited response time for use in active colour sequential displays and limited image grey scale. Herein we report the first observation of a spontaneously formed helix in a polar tilted smectic LC phase (SmC phase) of achiral bent-core (BC) molecules with the axis of helix lying parallel to the layer normal and a pitch much shorter than the optical wavelength. This new phase shows fast (∼30 μs) grey-scale switching due to the deformation of the helix by the electric field. Even more importantly, defect-free alignment is easily achieved for the first time for a BC mesogen, thus providing potential use in large-scale devices with fast linear and thresholdless electro-optical response.

Suggested Citation

  • Sithara P. Sreenilayam & Yuri P. Panarin & Jagdish K. Vij & Vitaly P. Panov & Anne Lehmann & Marco Poppe & Marko Prehm & Carsten Tschierske, 2016. "Spontaneous helix formation in non-chiral bent-core liquid crystals with fast linear electro-optic effect," Nature Communications, Nature, vol. 7(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11369
    DOI: 10.1038/ncomms11369
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