Low temperature photoluminescence and cathodoluminescence studies of nonpolar GaN grown using epitaxial lateral overgrowth
M. Häberlen, T.J. Badcock, M.A. Moram, J.L. Hollander, M.J. Kappers, P. Dawson, C.J. Humphreys, R.A. Oliver, Journal of Applied Physics 108 (2010).