Compositional inhomogeneity of a high-efficiency In(x)Ga(1-x)N based multiple quantum well ultraviolet emitter studied by three dimensional atom probe - Galtrey, M; Oliver, R; Kappers, M; McAleese, C; Zhu, D; Humphreys, C; Clifton, P; Larson, D; Cerezo, A (2008)