Fig. 1. Structural diagram of（a）ordinary cholesteric phase and（b）Ch_OH

Fig. 2. Field induced behavior of cholesterics structures.（a）Right-angle helicoidal cholesteric in a planar cell；（b）Sufficiently strong vertical electric field E realigns the cholesteric axis perpendicularly to itself，causing light-scattering fingerprint texture；（c）Heliconical structure in a cholesteric stabilized by the vertical electric field E₁；（d）Pitch P and tilt angle θ of the field-induced heliconical state decrease as the electric field increases，E₂>E₁；（e）As the field increases further，to some E₃>E₂，it unwinds the helical structure completely and forms a homeotropic nematic state^［16］.

Fig. 3. Electric field-controlled structural colors of a Ch_OH cell.（a）Polarizing optical microscope textures；（b）Reflection spectra，incident light is unpolarized^［17］.

Fig. 4. Absorbance and fluorescence spectra of laser dyes in CLC mixtures.（a）DCM；（b）LD688^［14］.

Fig. 5. Electric field dependence of the lasing wavelength λ for DCM and LD688 dye-doped CLCOH samples^［14］

Fig. 6. Spectra of heliconical cholesteric liquid crystals modulated by electricfiled with different mass fraction of chiral photosensitive materials（a）2.0%，（b）1.5%，（c）1.0%^［19］.

Fig. 7. Electrically tunable selective reflection of red，green and blue colours for different temperatures.（a）16.5 ℃；（b）18.5 ℃；（c）21.5 ℃；（d）25.5 ℃^［18］.

Fig. 8. Temperature dependence of the bend elastic constant K₃₃^［24］

Fig. 9. （a）Selective light reflection of mixture at different temperatures；（b）Reflection color image in reflection mode of polarized light microscope^［25］.

Fig. 10. Effect of（a）5CB，（b）R811 and（c）COC concentration on the phase transition temperatures between isotropic（Iso），nematic（N）and twist-bend nematic（N_tb）phases in the mixture^［25］.

Fig. 11. Reflection spectra recorded from the mixture for different values of the magnetic fields at temperatures of 32 ℃（bottom），35 ℃（middle）and 38 ℃（top），all are within the N^∗ range^［15］.

Fig. 12. Helix transformation based on a photo responsive cholesteric LC system by dual stimulation with electric field and light^［31］

Fig. 13. Performance of soft superstructure transformation with electrical and optical stimuli as driving modes^［31］

Fig. 14. Sample appearance in reflection mode under the action of an increasing static electric field in the absence（left column）and in the presence（right column）of an optical field^［32］.

Fig. 15. Evolution of optical intensity dependent central wavelength of the reflection band under various electric field intensities^［19］

Fig. 16. HTP value of Ch_OH under different power illumination^［19］

Fig. 17. Transmission spectra of polymer stabilized samples as a functionof electric field^［37］

Fig. 18. Electrically tunable colors in PS-M1^［38］

Fig. 19. Spectra of samples stabilized by different chiral doped polymers（a）R811 and（b）S811 under different detection light polarization conditions^［37］