Effect of the electric field on the linear polarization property of binary quantum dots

The splitting and shifting of eigen-energy levels of coupled binary quantum dots was theoretically studied. The amount of splitting as a function of applied electric field strength, in particular, was investigated. The eigen-energy of the system was calculated from the time-independent Schrodinger equation using a finite-difference method. It was found that a larger electric field leads to a larger amount of eigen-energy splitting. Since the degree of linear polarization is related to the amount of splitting of the eigen-energies, we can expect that the binary quantum dots should exhibit a stronger degree of linear polarization with increasing applied electric field.