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Ferroelectric Liquid Crystals: Physics and Applications

School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China
National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
School of Physics and Optoelectronic Engineering, Foshan University, Foshan, Guangdong 528325, China
State Key Laboratory on Advanced Displays and Optoelectronics Technologies, HKUST, Hong Kong
M. V. Lomonosov Moscow State University, 119991 Moscow, Russia
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia
Author to whom correspondence should be addressed.
Crystals 2019, 9(9), 470;
Received: 23 July 2019 / Revised: 21 August 2019 / Accepted: 6 September 2019 / Published: 9 September 2019
(This article belongs to the Special Issue Liquid Crystal Optics and Physics: Recent Advances and Prospects)
Electrooptic modes with fast response and high contrast ratio are highly desirable in modern photonics and displays. Ferroelectric liquid crystals (FLCs) are especially promising for fulfilling these demands by employing photoalignment technology in FLC cells. Three electrooptic modes including surface stabilized FLC (SSFLC), deformed helix ferroelectric (DHF) mode, and electrically suppressed helix (ESH) mode are reviewed with the corresponding electrooptic effects like bi- and multi-stable switching, continuous modulation of grayscale or phase, and high contrast switching. The general operation principles FLC electrooptic modes are described, and then the characteristics of each modes for potential applications are summarized. With the advantages of controllable anchoring energy, the photoalignment provides FLC samples with uniform alignment and high contrast ratio. The fast FLCs with a high resolution and high contrast can be used in the next generation display including field sequential color FLC microdisplays, as well as switchable 2D/3D televisions.
Keywords: ferroelectric liquid crystal; photo-alignment; fast response time; display; photonic devices ferroelectric liquid crystal; photo-alignment; fast response time; display; photonic devices
MDPI and ACS Style

Guo, Q.; Yan, K.; Chigrinov, V.; Zhao, H.; Tribelsky, M. Ferroelectric Liquid Crystals: Physics and Applications. Crystals 2019, 9, 470.

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