Figure 6From: Patterned growth of InGaN/GaN quantum wells on freestanding GaN grating by molecular beam epitaxy Photoluminescence (PL) spectra of the resultant epitaxial gratings. (a) PL spectra of epitaxial films on unpatterned template; (b)-(e) PL spectra of the resultant epitaxial gratings: (b) 700-nm-period gratings; (c) 500-nm-period gratings; (d) 450-nm-period gratings; (e) 400-nm-period gratings.Back to article page