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Figure 2 | Nanoscale Research Letters

Figure 2

From: Study of the omnidirectional photonic bandgap for dielectric mirrors based on porous silicon: effect of optical and physical thickness

Figure 2

Theoretical (dashed line) and experimental (solid line) reflectivity spectra for structures with the same OT. The PBG generated using the (a) sinusoidal, (b) Gaussian, and (c) Bragg profiles for 8°. The corresponding reflectivity spectra at 68° are shown in panels (d), (e), and (f), respectively. The overlapping of the experimental PBG between 8° and 68° is shown as a gray band (taken for the reflectance more than or equal to 90%).

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