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 drawing of the mechanism of the thermal diffusion induced pitch gradient, (b) the transmission spectrum of the IR shielding film in different areas, (c) the polarized optical microscope photograph of the film, and (d) the representative SEM micrograph of the cross-section of the film.^[42]