Effects of the built-in electric field on free and bound excitons in a polar GaN/AlGaN/GaN based heterostructure

Loïc Méchin, François Médard, Joël Leymarie +4

Low-temperature luminescence spectra reveal the presence of two independant populations of GaN excitons within a $GaN/AlGaN/GaN/A{\mathrm{l}}_2{\mathrm{O}}_3$ heterostructure in which a thick (…