Linear optical response of zinc-blende and wurtzite III-N (III=B, Al, Ga, and In)

Abstract

We present calculated dielectric function ε( ω) and linear optical absorption α( ω) of the cubic and hexagonal structures of BN, AlN, GaN, and InN, employing an all-electron linearized augmented plane wave method within the local density approximation (LDA) plus quasi-particle (QP) correction. We show that this LDA+QP approach yields accurate high-frequency dielectric constant ε( ∞). Moreover, by employing a modelled electron–optical phonon interaction we calculate the static dielectric function ε(0).