INPLANE PROPAGATION OF MILLIMETER WAVES IN PERIODIC MAGNETOACTIVE SEMICONDUCTOR STRUCTURES

Non-transmission bands of electromagnetic waves propagating along the layers in periodic structures are studied in the steady magnetic field perpendicular both to the uniaxis and the direction of propagation. T he band control range (36 divided by 75 GHz) in n-InSb/Al2O3 structure s with the carrier densities 4 10(13) less than or equal to n less tha n or equal to 8 10(14) cm(-3) in magnetic fields B-o less than or equa l to 2 T at temperatures 77 less than or equal to T less than or equal to 200 K is found to agree with the calculated in the effective mediu m approximation. Attenuation down to -50 dB within the band is observe d. The band lineshape is found to indicate additional effects related to the finite layer thickness and periodicity termination predicted by a more rigorous theory of dispersion.