Open AccessOptimization of diffraction properties for holographic polymer dispersed liquid crystal
Author(s) -
Bin Zhang,
Yanjun Liu,
Xu Shu,
Jia Yu
Publication year - 2003
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.52.91
Subject(s) - materials science , diffraction efficiency , diffraction , liquid crystal , polymer , optics , holography , scanning electron microscope , refractive index , phase (matter) , polymerization , optical microscope , optoelectronics , composite material , organic chemistry , chemistry , physics
Holographic polymer-dispersed liquid crystal (HPDLC) is a kind of switchable volume holography. It can be manufactured according to the photo-initiated polymerization-induced phase separation. HPDLC is composed of parallel, periodic polymer-rich and liquid crystal-rich planes. The diffraction efficiency can be modulated by the application of electric field. HPDLC devices are potentially useful for optical communication, information storage and display. How to increase the diffraction efficiency is the key to application. We investigated the dependence of diffraction efficiency on the refractive index of the polymer, exposure intensity, liquid crystal loading and temperature. The best conditions were found to make the diffraction properties optimized. Now the highest diffraction efficiency was 802%. The HPDLC morphologies were also observed and analyzed by scanning electron microscope (SEM).