Local structural characterization of epitaxial a ‐plane InGaN/GaN thin films by transmission electron microscopy

Structural analysis of the submicron area of an InGaN thin film was conducted using transmission electron microscopy. By obtaining the selected area diffraction patterns of c -plane InGaN/GaN and a -plane InGaN/GaN films, the local lattice parameters were measured. Coherent growths were checked at the respective samples for different growth orientations, and the In concentration of the InGaN layer was also measured. Furthermore, there is a slight tilt in the growth direction between the GaN and InGaN layers in the a -plane InGaN/GaN film. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)