Fig. 1. Schematic of a multilayered polarization independent grating reflector under normal incidence with TE and TM polarization light

Fig. 2. SEM image of the reflector

Fig. 3. (a) Reflectance and (b) transmittance spectra of the reflector normally illuminated by both TE and TM polarized light

Fig. 4. Reflectance spectra of the reflector with and without middle layer for (a) TE and (b) TM polarization light incidence

Fig. 5. Angular response spectra of the reflector for (a) TE and (b) TM polarization light at the wavelength of 1.68 μm

Fig. 6. Insertion loss and polarization dependent loss curves of the reflector

Fig. 7. Theoretical, experimental and SEM observed reflectivity curves for (a) TE and (b) TM polarization light