Intersubband optical absorption in the GaN/AlN quantum wire with donor doping

In this study, we investigate the optical absorption within the conduction subbands of a cylindrical GaN/AlN quantum wire. We analyse the optical absorption rate and the real part of the dielectric function for quantum wire (QWR) in the presence of donor-impurity states. The results cover that the density of states associated with free motion in the QWR structure leads to a lower optical absorption compared to the quantum dots, as evidenced by the optical spectra. This study advances the understanding of GaN/AlN heterostructures by offering a useful analysis of the optical properties of QWRs, especially under donor doping. As a result, the outcomes provide a clear evidence of the effect of semiconductor nanostructures on the optical properties of optoelectronic devices.