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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

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Field-induced dynamics and structures in a cholesteric-blue-phase cell.

Jun-ichi Fukuda¹, Slobodan Žumer

¹Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba 305-8568, Japan. fukuda.jun-ichi@aist.go.jp

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|May 18, 2013

Summary

We numerically studied cholesteric blue phases (BP) in electric fields. Disclination network reorganization depends on field strength and history, with complex relaxation dynamics after field removal.

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Area of Science:

Materials Science
Liquid Crystals
Soft Matter Physics

Background:

Cholesteric blue phases (BP) exhibit unique orientational order.
Understanding their response to external stimuli is crucial for applications.

Purpose of the Study:

Investigate the relaxational dynamics of BP orientational order under electric fields.
Analyze disclination network reorganization and relaxation processes.

Main Methods:

Numerical simulations of cholesteric blue phase (BP) in a planar cell.
Focus on blue phase I (BP I) stability.
Analysis of response to electric field application and cessation.

Main Results:

Disclination network reorganization depends on electric field strength and application history.
Relaxation dynamics after field cessation are complex.
Relaxation is sensitive to the pre-cessation orientational order profile.

Conclusions:

Electric field history significantly influences BP reorganization.
Complex relaxation dynamics highlight the sensitivity of BP to pre-existing order.