Explain the difference between a multiple quantum well structure and a superlattice. For a deep quantum well of GaAs with a thickness Lz = 70 A, ˚ Lx = Ly = 100 μm, calculate the magnitude of the...

Explain the difference between a multiple quantum well structure and a superlattice.

For a deep quantum well of GaAs with a thickness Lz = 70 A, ˚ Lx = Ly = 100

μm, calculate the magnitude of the steps in the conduction band cumulative

density of states function and the energies at which they occur relative to the

bottom of the well for the n = 1, 2 and 3 levels. (Assume that the well has

infinitely high sidewalls.)