We investigate alignment and electro-optical properties of a room temperature dye-doped antiferroelectric liquid-crystal mixture. We achieve uniform alignment on a macroscopic scale of thin cells with the combination of proper surface alignment and electric field treatment. We also successfully demonstrate that two films of dye-doped antiferroelectric liquid crystals in their anticlinic chiral smectic C phase can be used to switch the transmitted light intensity between dark and bright states without the need for polarizer filters. We also show that one can get either normally dark or bright states. Normally dark states can be useful in a number of applications such as in privacy windows or smart refrigerators. A normally transparent display has applications in a plethora of other areas, such as navigation systems, built-in windshields, in goggles, or smart windows.
ASJC Scopus subject areas
- Physics and Astronomy(all)