Fig. 1. Structure diagram of PT symmetric photonic crystal with defect layer of magnetic fluid

Fig. 2. Effective refractive index of magnetofluid layer varies with magnetic factor at different volume fractions

Fig. 3. Transmission spectrum of structure under different period N. (a) N=5; (b) N is 5, 6, 7, and 8, respectively

Fig. 4. Transmission spectra and defect mode location of structures in different magnetic factors. (a) 0.20--0.50; (b) 0--0.35; (c) 0.35--0.70; (d) relationship between center wavelength of defect mode 1 and 2 with α_M

Fig. 5. Influence of macroscopic Lorentz oscillation intensity on structure transmittance. (a) Corresponding wavelength region of α_M from 0 to 0.35; (b) corresponding wavelength region of α_M from 0.35 to 0.70

Fig. 6. Transmittance of structure at 1550 nm varies with α_M. (a) α_M changes from 0 to 0.10; (b) α_M changes from 0.60 to 0.70

Fig. 7. Extinction ratio and local magnification of structure with different α_M values. (a) α_M changes from 0 to 0.10; (b) α_M changes from 0.60 to 0.70

Fig. 8. Relationship between structure wavelength and extinction ratio. (a) Corresponding wavelength region of α_M from 0 to 0.35; (b) corresponding wavelength region of α_M from 0.35 to 0.70

Fig. 9. Modulation sensitivity of α_M to defect mode position and transmittance. (a)(c) Modulation sensitivity of α_M to defect mode transmittance; (b)(d) modulation sensitivity of α_M to defect mode position