Research progress of cholesteric liquid crystals with broadband reflection characteristics in application of intelligent optical modulation materials

Zhang Lan-Ying^{1, 3}, Gao Yan-Zi¹, Song Ping¹, Wu Xiao-Juan², Yuan Xiao¹, He Bao-Feng¹, Chen Xing-Wu², Hu Wang², Guo Ren-Wei², Ding Hang-Jun², Xiao Jiu-Mei², Yang Huai^{1, 2, 3, †,}

(a) Schematic representation of the mechanism of the thermal diffusion induced pitch gradient, (b) the transmission spectrum of the bilayer film after annealing, and (c) the representative TEM micrograph of the bilayer film.^[40]