Electrically switchable cholesteric gratings based on slit electrodes.
An electrically switchable diffraction grating (ESDG) based on cholesteric liquid crystal (CLC) filled into the cell with slit electrodes is demonstrated in this study. On one hand, with low voltage, the ESDG has high second order diffraction efficiency because of the alternating planar and fingerprint textures. With high voltage, on the other hand, the ESDG has high first order diffraction efficiency because of the alternating planar and homeotropic textures. The first and second order diffraction efficiencies of ESDG are electrically swapped. The maximum diffraction efficiency of the ESDG is approximately 32% at each grating mode.
Chie-Tong
CT
Kuo
Ru-Hsien
RH
Chiang
Chun-Yen
CY
Wang
Ping-Hung
PH
Hsieh
Yen-Ting
YT
Lin
Chi-Huang
CH
Lin
Chi-Yen
CY
Huang