Minibands of magnetoplasmons in semiconductor superlattices in a perpendicular external magnetic field

Studies are performed on the minibands and the optical response of magnetoplasmons in periodic stratified structures of highly doped semiconductors accounting for an external magnetic Bo field in the perpendicular configuration. Incident light of p polarization is considered to calculate the reflectivities R-pp of p polarization and R-ps of the conversion from p to s polarization, with the results being interpreted as resonances of Fabry Perot of the waves in the layers and the allowed minibands and forbidden minigaps of bulk magnetoplasmons in the superlattices. The structures shift to lower frequencies, and at the same time the minigaps enlarge as the strength of the Bo field decreases. Variations of the structural parameters and the magnetic field permit us to monitor the minibands and minigaps of mode propagation in the superlattices. [S0163-1829(99)02516-3].