Fig. 3From: Multicolor Emission from Ultraviolet GaN-Based Photonic Quasicrystal Nanopyramid Structure with Semipolar InxGa1−xN/GaN Multiple Quantum Wellsa The tiled angle-view SEM image of the PQC structure. b The cross-sectional-view SEM image of the PQC structure with porous SiO2. c Top-view SEM image of the PQC structure after the regrowth procedure. d Magnifying SEM image of semipolar {10-11} InxGa1−xN/GaN MQW with the facets of trapezoid microstructuresBack to article page