%0 Journal Article %T Interband and intersubband optical characterization of semipolar (112¯2)-oriented GaN/AlN multiple-quantum-well structures %+ Nanophysique et Semiconducteurs (NPSC) %+ Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252) %+ Institut d'électronique fondamentale (IEF) %A Lahourcade, L. %A Kandaswamy, P. K. %A Renard, J. %A Ruterana, Pierre %A Machhadani, H. %A Tchernycheva, M. %A Julien, F.H. %A Gayral, B. %A Monroy, E. %< avec comité de lecture %@ 0003-6951 %J Applied Physics Letters %I American Institute of Physics %V 93 %P 111906 %8 2008 %D 2008 %Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles %X We report on semipolar GaN/AlN multiple-quantum-well structures grown on m-plane sapphire by plasma-assisted molecular-beam epitaxy. Optical investigation confirms a significant reduction in the quantum-confined Stark effect, in agreement with theoretical calculations, which predict an internal electric field between 0.6 and −0.55 MV/cm in the quantum wells, depending on the strain state. With respect to polar materials, the reduction in the internal electric field results in a substantial redshift of the intersubband energy. %G English %L cea-00373661 %U https://cea.hal.science/cea-00373661 %~ CEA %~ CNRS %~ UNIV-PSUD %~ INSA-ROUEN %~ INAC-SP2M %~ DSM-INAC %~ COMUE-NORMANDIE %~ IRAMIS-CIMAP %~ UNIV-PARIS-SACLAY %~ UNIV-PSUD-SACLAY %~ CEA-DRF %~ UNIROUEN %~ ENSICAEN %~ UNICAEN %~ INSA-GROUPE %~ IRIG %~ CEA-GRE %~ CIMAP %~ PM2E-CIMAP %~ IRAMIS