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. 2017 Mar 27;7:45344. doi: 10.1038/srep45344

Figure 4.

Figure 4

(a) Photographs under room light illumination (scale bar = 1 cm) and (b) Experimental reflectances of a number of GaN/MP-GaN DBR structures with different layer thicknesses demonstrating tunable photonic band gaps across the visible spectrum. (c) Current-voltage (I-V) curves of the non-polar GaN/MP-GaN DBR structure.