Polarization dependence of III-nitride superlattice transmission coefficient

We study the tunnelling process and behaviour of the transmission coefficient of an AlN/GaN superlattice as the internal polarizations in the composing layers change. Our calculations are based on the transfer matrix formalism and the exact solution of the Schr?dinger's equation provided by the Airy functions. We also examine the dependence between the minizones width and the magnitude of the internal polarizations both for unbiased and biased structure.