Publication Date:
2014-07-10
Description:
The dynamic response of a polymer-stabilized blue phase liquid crystal (BPLC) is comprised of two distinct processes: Kerr effect-induced local reorientation and electrostriction-induced lattice distortion. A double exponential rise/decay model is proposed to analyze the underlying physical mechanisms. If the electric field is below a critical field ( E c ), Kerr effect dominates and the response time is fast. However, when E 〉 E c electrostriction effect manifests, leading to an increased response time and a noticeable hysteresis. A higher polymer concentration helps suppress electrostriction, but the tradeoff is increased operation voltage. These results provide useful guidelines for future BPLC material and device optimizations.
Print ISSN:
0003-6951
Electronic ISSN:
1077-3118
Topics:
Physics
Permalink