Tight-binding model for the electronic and optical properties of nitride-based quantum dots

✍ Scribed by S. Schulz; D. Mourad; S. Schumacher; G. Czycholl

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 849 KB
• Volume: 248
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.201147158

✦ Synopsis

Abstract

Two slightly different, efficient tight‐binding (TB) models for the description of the electronic properties of nitride‐based semiconductor quantum dots (QDs) have been developed and applied to the calculation of the electronic one‐particle spectrum of these structures. Using these one‐particle QD‐states, dipole and Coulomb matrix elements can be calculated, from which the optical properties of these systems can be obtained. These TB calculations have been performed for nitride‐based QDs with a cubic zincblende structure and those with a wurtzite crystal structure. In this paper, we discuss the general methodology used and the results obtained for the electronic one‐particle states and energies, for the dipole and Coulomb matrix elements, and for the excitonic optical emission and absorption spectra.