Fig. 1. Formation mechanism of holographic polymer dispersed liquid crystal grating

Fig. 2. Diagram of the reproduction of the Bragg angle of the transmissive volume hologram

Fig. 3. Schematic diagram of the liquid crystal cell

Fig. 4. Diagram of interference and detection optical path

Fig. 5. （a）Diffraction efficiency curves of monomers with different functionalities as exposure；（b）Comparison of the effects of different functional monomers on the diffraction efficiency of doped and undoped samples.

Fig. 6. Transmittance curves of gratings with different functionalities

Fig. 7. （a）Diffraction efficiency variation curves and（b）transmittance change curves of single-monomer and dual-monomer

Fig. 8. Chemical structural formulas of two monomers

Fig. 9. （a）Diffraction efficiency curve and（b）grating morphology of the sample at spatial frequency 2 941 lp/mm

Fig. 10. （a）Curves of diffraction efficiency versus initiator content（mass fraction）；（b）Transmittance curves（w（RB）=0.8%，w（RB）=1.0%）.

Fig. 11. Grating morphology images of grating samples with different initiator contents（mass fraction）

Fig. 12. AFM image of grating at the ration of w（RB）=1.0%

Fig. 13. Curves of wavelength response to bandwidth

Fig. 14. Grating sample image