Title

Sub-Millisecond Response Phase Modulator Using A Low Crossover Frequency Dual-Frequency Liquid Crystal

Keywords

Dielectric relaxation; Dual-frequency liquid crystal; Fast response; Phase modulator

Abstract

A high birefringence (Δn = 0.292 at λ = 633 nm, 25°C) and low crossover frequency (<1 kHz at T = 25°C) dual-frequency liquid crystal (DFLC) mixture was developed. The high birefringence enabled us to use a thin liquid crystal cell, which is helpful for fast response time and low operating voltage. The initially low crossover frequency allowed us to operate the DFLC device at an elevated temperature, which significantly lowers the viscosity while keeping the crossover frequency in an acceptable range (<10 kHz). We demonstrated a 2π phase shifter at λ = 633 nm using such a DFLC and obtained a sub-millisecond response time at T∼45°C. This type of DFLC mixture together with elevated temperature operation opens a new way for achieving fast response time. © 2008 Taylor & Francis.

Publication Date

12-1-2008

Publication Title

Liquid Crystals

Volume

35

Issue

12

Number of Pages

1409-1413

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1080/02678290802624399

Socpus ID

57749085471 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/57749085471

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