Optically Switchable Bragg Reflectors

One‐dimensional holographic photonic crystals that incorporate photochromic azobenzene‐derived liquid crystals (LCs) have been produced. The additive photochromic molecules disrupt the host LC nematic order, inducing an isothermal phase transition and changing the effective dielectric properties of...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2004-08, Vol.16 (16), p.1453-1456
Main Authors: Urbas, A., Klosterman, J., Tondiglia, V., Natarajan, L., Sutherland, R., Tsutsumi, O., Ikeda, T., Bunning, T.
Format: Article
Language:English
Subjects:
holographic
Liquid crystals
Photochromic materials
Photonic crystals
Photonic crystals, holographic
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Summary:One‐dimensional holographic photonic crystals that incorporate photochromic azobenzene‐derived liquid crystals (LCs) have been produced. The additive photochromic molecules disrupt the host LC nematic order, inducing an isothermal phase transition and changing the effective dielectric properties of the LC layer (see Figure). This imparts photo‐optic properties to the structure, allowing for its reflectivity to be modulated with exposure to light.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200400206