Advanced bistable cholesteric light shutter with dual frequency nematic liquid crystal

Large range electrically-induced reflection notch tuning in polymer stabilized cholesteric liquid crystals

“…Electrically-induced dynamic optical responses have been examined in CLCs or polymer stabilized CLCs (PSCLCs) including reflection notch switching, [3][4][5][6][7][8][9][10][11][12][13][14][15][16] broadening, [17][18][19][20][21][22][23][24] and tuning. [25][26][27][28][29][30][31][32] Most commonly, the dynamic changes in the reflection of CLCs or PSCLCs are observed by inducing tilt in the pitch in samples formulated with nematic liquid crystals with positive dielectric anisotropy (+De).…”

Influence of Curing Frequency on the Morphology and the Electro-Optical Property of Polymer-Stabilized Cholesteric Textures

“…They can be electrically switched between the strongly scattering state and the highly transparent state. PSCTs have several advantages, such as low driving voltage, fast response time, high contrast ratio, bistability for creating a image at zero field, and high brightness of the reflected image, and have been widely applied in optical switches, optical attenuators, and three-dimensional displays [13][14][15]. According to the textures of the field-on and the field-off, PSCTs can be sorted into a normal-mode and a reverse-mode device [3,11].…”

Dynamic Tuning and Memory Switching of Defect Modes in a Hybrid Photonic Structure

“…Since LC phases with periodically helical structures can intrinsically be regarded as PCs, various LC-based PC devices with tunable optical features by light irradiations [8,9] or by electric-field treatments [10,11] have previously been demonstrated. Alternatively, recent investigations concerning the tunability of defect modes as well as the design of electrically tunable photonic devices have extensively been proposed in the literature by incorporating various types of LCs individually in one-dimensional (1D) multilayer PCs [12].…”