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Updated: Jul 20, 2026
An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
Published on: February 27, 2019
Analog low-loss full-range phase modulation by utilizing a V-shaped switched ferroelectric liquid-crystal cell in
David Engström1, Per Rudquist, Jörgen Bengtsson
1Photonics Laboratory, Department of Microtechology and Nanoscience, Chalmers University of Technology, Goteborg, Sweden. david.engstrom@mc2.chalmers.se
Abstract:
We have studied the analog (V-shaped switching) mode in ferroelectric liquid crystals in reflective mode for analog phase modulation applications. We have found that several combinations of cell thicknesses and input polarization states exist for which near-lossless analog phase modulation with a range of approximately 2pi rad is obtained, and we demonstrate one such combination experimentally. Despite a slight deviation from the ideal conditions, e.g., the tilt angle was 38 degrees instead of the desired 45 degrees , virtually pure 1.6pi rad phase modulation was obtained; the measured values agree very well with our numerical simulations of the real device.
