Structures Containing Left-Handed Metamaterials with Refractive Index Gradient: Exact Analytical Versus Numerical Treatment
2009 (English)In: Microwave Review, ISSN 1450-5835, ISSN 1450-5835, Vol. 15, no 2, 2-5 p.Article in journal (Refereed) Published
We investigated propagation of electromagnetic waves through composite structures with negative refractive index, the popular ”left-handed metamaterials”, for the case when there is a gradient of refractive index. We obtained the exact analytical solutions to the Helmholtz equation valid for arbitrary steepness of the graded interface between the positive and the negative index part. We analyzed the special case of matched impedances of the two constituent materials within the metamaterial composite. We derived analytical expressions for the field intensity, transmission and reflection coefficients and compared them with the results obtained by the numerical simulations using the Finite Element Method. The model allows for arbitrary spectral dispersion and lossy media.
Place, publisher, year, edition, pages
Belgrade, Serbia: Society for Microwave Technique, Technologies and Systems , 2009. Vol. 15, no 2, 2-5 p.
Electromagnetic Metamaterials, Left-Handed Metamaterials, Negative Refractive Index, Refractive Index Gradient
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-61079OAI: oai:DiVA.org:kth-61079DiVA: diva2:478475
QC 201201262012-01-262012-01-162014-04-10Bibliographically approved