Dielectric dispersion on the Kerr constant of blue phase liquid crystals

Abstract

Dielectric dispersions on the Kerr constant of two polymer-stabilized blue phase liquid crystals (BPLCs) are investigated. An extended Cole-Cole model is proposed to fit the experimental results and good agreement is obtained. As the electric field frequency increases, Kerr constant decreases and the associated dielectric heating effect gradually increases. These results will undoubtedly affect the high frequency operation of BPLC devices.

A low voltage and submillisecond-response polymer-stabilized blue phase liquid crystal

“…Accordingly, the Kerr constant will decrease following the extended Coles-Coles model. 34 Ideally, a driving frequency higher than 180 Hz is required for color sequential displays. If we increase the driving frequency to 240 Hz, Kerr constant will drop by 8%, which in turn increases the on-state voltage by $4%.…”

Recent advances in polymer network liquid crystal spatial light modulators

“…Nematic LC host with Δε greater than 100 has already been adopted in polymer‐stabilized blue phase LC devices . A major concern of this approach is that the dielectric relaxation frequency of such a huge Δε LC is relatively low (∼1 kHz) …”

“…Moreover, operating at a high frequency would cause dielectric heating which would shift the crossover frequency and result in performance instability . Polymer‐stabilized blue phase LC exhibits optical isotropy and fast response time due to its self‐assembled nanostructure . It is quite promising for next‐generation information display, but difficult to achieve 2π phase change because its phase dynamic range is only one third of a nematic LC.…”

Polarization independent blue-phase liquid crystal cylindrical lens with a resistive film

“…Recently, polymer-stabilized blue-phase liquid crystal (BPLC) [15][16][17][18][19][20][21] has found useful applications in photonic devices because of its submillisecond gray-level response time [22,23]. A hole-patterned [24] microlens using a polymer-stabilized BPLC was demonstrated experimentally with a fast response time and polarization insensitivity.…”