TUNNELING OF ELECTROMAGNETIC WAVES THROUGH THE THREE-LAYERED STRUCTURE CONTAINING A NEGATIVE-PERMITTIVITY LAYER

Abstract

Subject and purpose. The effect of reflectionless transmission (tunneling) of electromagnetic waves through the three-layer structure containing a negative-permittivity layer is of great importance both for studying the fundamental properties of solids and for developing new types of unique technical devices. There is a need for investigation of the effect of reflectionless transmission of electromagnetic waves through the three-layer structure containing a negative-permittivity layer in a wide range of the three-layer structure parameters. Methods and methodology. A new approach based on the use of dimensionless thicknesses of a three-layer structure is presented. This approach makes it possible to study the effect of reflectionless transmission of electromagnetic waves for different wavelengths and different values of parameters of the three-layer structure with asymmetric dielectric surroundings. Results. It is shown that the presence of a negative-permittivity layer in the three-layer structure leads to a significant softening of limitations on the parameters of the positive-permittivity layers. Thus, the effect of reflectionless transmission of electromagnetic waves takes place at any preassigned positive value of the permittivity of the layers surrounding symmetrically the negative-permittivity layer. In this case, the parameters of the negative-permittivity layer should be chosen as required. Conclusions. The results of the research extend knowledge on the mechanisms of electromagnetic waves tunneling through the three-layer structures containing negative-permittivity layers. This effect can be used for development of new types of high-frequency solid-state devices operating in different wavelength ranges

Keywords

• negative-permittivity medium
• reflectionless transmission
• three-layered structure
• tunneling