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Optically Switchable Bragg Reflectors
Author(s) -
Urbas A.,
Klosterman J.,
Tondiglia V.,
Natarajan L.,
Sutherland R.,
Tsutsumi O.,
Ikeda T.,
Bunning T.
Publication year - 2004
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200400206
Subject(s) - photochromism , materials science , azobenzene , liquid crystal , optoelectronics , holography , dielectric , photonics , optics , phase transition , molecule , phase (matter) , polymer , nanotechnology , condensed matter physics , composite material , organic chemistry , physics , chemistry
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.