Perex
Abstract:
Text
We studied the dispersion relations of the MSPs and their coupling to
bulk and waveguide modes in the three types of THz guiding structures,
namely InSb/dielectric planar boundary, InSb/air/metal planar waveguide,
and symmetric InSb/air/InSb planar waveguide. In particular we
demonstrated the possibilities for tuning the central frequencies of the
one-way gap and its bandwidth by varying the amplitude of an external
magnetic field, the permittivity and thickness of the dielectric guiding
layer. Then we evaluated the dispersion relations of all modes
supported by the waveguide structures and analyzed their properties in
terms of their propagation constants. By using our in-house 2D numerical
technique based on the magnetooptic aperiodic rigorous coupled wave
analysis (MOaRCWA), we evaluated the relative spectral transmittances in
both forward and backward directions of propagation for the structures
considered. Our approach deals with the configurations, in which the
magnetized sections are sandwiched between the identical structures but
without the magnetic field. We believe that this configuration is closer
to a structure that might be adopted in envisaged future applications.