Structure and operating principles of T-PNLC. (a) At V = 0, LC directors near two glass substrates are orthogonal to each other, and LC directors are parallel to z-direction in the middle region. (b) At V1 > Vth, LC directors near two glass substrates are reoriented by the electric field. (c) At V2 ≫ Vth, LC directors are perpendicular to the glass substrate.
(a) The side view of SEM image of T-PNLC, and (b) the magnification image of polymer networks of (a). (c) The image of T-PNLC under two crossed polarizers. P and A are the transmissive axes of the polarizer and the analyzer.
Transmittance as a function of voltage for pure LC cell (gray line), T-PNLC at Vc = 2.5 Vrms (dotted line), and T-PNLC at Vc = 4 Vrms (black line). Phase shift as a function of voltage for T-PNLC at Vc = 2.5 Vrms (hollow ones) and T-PNLC at Vc = 4 Vrms (solid ones). Blue solid/hollow diamonds, green solid/hollow triangles, red solid/hollow squares stand for the angle of polarizer of 0°, 45°, 90°, respectively. Black solid/hollow circles represent unpolarized light.
The illustration of the relative coordinates between the incident-oblique light and the sample.
d1 as a function of θp at different (a) for Vc = 2.5 Vrms and (b) for Vc = 4 Vrms. The intersections of the curves represent the solutions of θp andd1. Black solid dots represent = 0, red hollow squares represent =±7°, blue solid triangles represent = ±10°, green hollow dots represent = ±12°, and gray hollow diamonds represent = ±15°.
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