Chiang Mai Journal of Science

The  empirical tight-binding calculations of electron and hole states for ellipsoidal InAs nanocrystals passivated by hydrogen atoms are presented. The electronic structure is numerically calculated for various shapes within keeping a constant volume of nanocrystals. The significant impact of the shape for the nanocrystals on the electronic structure and the emission spectra along the x, y and z polarized direction is fruitfully observed. The results demonstrate that by changing the ellipsoidal aspect ratios the electronic structure and optical signatures are different.