COUPLING EFFICIENCY OF METAMATERIAL MAGNETOOPTICAL INTEGRATED ISOLATOR

摘要

The cutoff thickness of magnetooptical isolator consists of isotropic magnetooptical materials film and cladding and MTMs substrate is calculated. It is found that the cutoff thickness of the isolator can be tuned by changing the values of εs and us. A further step is done by calculating the coupling efficiencies into Gaussian profile for forward and backward propagation. The results exhibit that the coupling efficiencies vary with changing the MTM parameters. The thickness of the isolator is chosen such that a big variation between the coupling efficiencies for forward and backward propagation is produced. The results are encouraging to be applied to the design of various nonreciprocal integrated-optical devices which use the first mode.