A hydrodynamic model is used to determine the finite thickness effect of the electron layers on the plasmon dispersion relation for the GaAs-Al_xGa_1-xAs superalattice. Although the model, which includes the layer thickness, gives only small changes f...
A hydrodynamic model is used to determine the finite thickness effect of the electron layers on the plasmon dispersion relation for the GaAs-Al_xGa_1-xAs superalattice. Although the model, which includes the layer thickness, gives only small changes from the zero-thickness (two-dimensional) model, it is just enough to remove the discrepancy between the theory based on the two-dimensional model and experiment. Assuming that the main damping mechanism for the linewidth broadening of transmission spectrocopy is collisional, the result of this work can be applied to find the resistivity of semiconductor superlattices without probing by the Helicon wave propagation method.