Abstract
In this work, a waveguide structure consisting of a new artificial negative index material (NIM) surrounded by a nonlinear cover and a ferrite (YIG) substrate has been designed and investigated. We apply the boundary conditions and impose the condition of negative effective permeability of the ferrite slab to derive the dispersion relation related to the proposed structure. The NIM permittivity and permeability are not constant and depend on the operating frequency. The dispersion properties of the nonlinear electromagnetic surface waves (NEM) are analyzed and the associated propagation index is calculated. Results show that the dispersion could be tuned and controlled by selecting the NIM film thickness and the film-cover interface nonlinearity. The proposed structure is supporting unusual types of NEM surface waves having a non-reciprocal behavior widely used in designing optoelectronic devices.
Highlights
Negative index materials (NIM) are artificially designed structures with negative permittivity and permeability providing a route to create potential devices with fascinating electromagnetic properties that cannot be obtained with natural materials [1]-[6]
A waveguide structure consisting of a new artificial negative index material (NIM) surrounded by a nonlinear cover and a ferrite (YIG) substrate has been designed and investigated
We aim at studying a magnetic structure with a negative index material (NIM) core surrounded by a nonlinear cover cladding and a ferrite substrate, where unusual electromagnetic surface waves-basically not existing in a conventional waveguide-are examined [21]
Summary
Negative index materials (NIM) are artificially designed structures with negative permittivity and permeability providing a route to create potential devices with fascinating electromagnetic properties that cannot be obtained with natural materials [1]-[6]. In most investigations dealing with the planar nonlinear waveguides, the basic attention has been given to the electromagnetic surface waves [20] Despite these advanced studies, new modes of propagation due to the variation of NIM’s parameters (permittivity and permeability) in new NIM waveguide were not investigated. The numerical results are given in order to draw attention on the variation in surface wave’s behavior propagating in different waveguide structures, as in the considered waveguide based on NIM core [13] [22] having negative permittivity ε2 and permeability μ2both depending on the operating frequency ω, the NEM waves propagate in a non-conventional way comparing with those propagating in classical structures. This work’s results can be used in designing and fabricating microwave devices for a wide range of applications as isolators, sensors, circulators, solar cells
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
