Institution: | 1. U.S. Army Research Laboratory, Sensors and Electron Devices Directorate, RDRL‐SEE‐M, 2800 Powder Mill Road, Adelphi, Maryland 20783, USA;2. Materials Department, University of California, Santa Barbara, California 93106‐5050, USA;3. Currently at Osram Opto Semiconductors GmbH, Leibnizstra?e 4, 93055 Regensburg, Germany |