Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 2019),
  • paper ch_9_2

Hyperspectral imaging of bio-inspired tilted cholesteric liquid crystal structures

Not Accessible

Your library or personal account may give you access

Abstract

The cholesteric liquid crystal (CLC) phase exhibits a helical structure with a twist axis perpendicular to the local molecular director. When light propagates in the Bragg regime through a CLC slab with a planar texture, the medium gives rise to Bragg reflection, selective in wavelength and in polarization. The characteristics of the Bragg band are tunable by acting on the following structural parameters: the pitch, the helicity sense and the helix orientation. Tuning the latter parameter produces polygonal textures (Fig. 1, center). Such a texture is made of an array of micrometer-scale polygonal cells, acting a network of microlenses with wavelength-tunable focusing properties [1]. Polygonal textures can be found in biological CLCs (for instance, multiwavelength micromirrors the cuticle of scarab beetle Chrysina gloriosa [2]).

© 2019 IEEE

PDF Article
More Like This
Hyperspectral topography of the twisted, cholesteric patterns of an insect cuticle in the context of biomimicry

Aurélie Jullien, Maxim Neradovskiy, Adriana Scarangella, and Michel Mitov
ch_9_1 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2021

Dispersion Measurement of Femtosecond Pulses Through Photonic Band-Gap Edges of Cholesteric Liquid Crystals

Maxim Neradovskiy, Umberto Bortolozzo, Stefania Residori, Aurélie Jullien, Adriana Scarangella, and Michel Mitov
ce_6_4 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2019

Polarization Bistability in Cholesteric Liquid Crystals

Herbert G. Winful
ThB21 Optical Bistability (OBI) 1983

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved