The use of GAN templates, prepared by lateral epitaxial overgrowth (LEO) method, for improving quantum efficiency in nonpolar (112̄o) AlGaN/GaN multiple quantum wells (MQW), was investigated. The polarized optical reflectance (OR) and photoluminescence (PL) spectra of LEO-GaN were analyzed for the study. A moderate shift of the photoluminescence (PL) peak energy and negligible change in low-temperature Pl lifetime with decreasing well width were observed. Both phenomena were found to be the results of eliminating quantum-confined Stark effects due to the polarization fields that existed in polar (0001) MQWs.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)