Radiation from Elementary Sources Located in Chiral Surrounded Dispersive Medium

Abstract

Transmissionofelectromagneticfieldsthroughaninterfaceofbounded dispersive dielectric-magnetic and unbounded chiral metamaterial is studied in the present thesis. Planar interface and current sheet as a source of excitation placed in non-dispersive/dispersive dielectricmagneticmediumsurroundedbyunboundedchiral/chiral nihility medium is considered. Transmission of electromagnetic fields from non-dispersive/dispersive/nihility interfaces placed in chiral medium is determined. Also a circular cylindrical interface of infinite length and a line source located within the dispersive dielectric-magneticmedium,assourceofexcitation,areconsidered. Lorentz -Drude model is used for dispersive dielectric-magnetic medium. The fields transmitted from the dispersive medium, occupiedbythecylinder,intounboundedchiral/chiralnihilitymetamaterialsareobtained. Characteristicsofradiationinchiralnihility metamaterial from dispersive cylinder having very small radii is also explored. This limiting case may enable us to comment on radiation behavior of an elementary source located in an unbounded chiral nihility metamaterial. Case of nihility cylinder carrying line source and surrounded by unbounded chiral metamaterial is also taken into account. Coated dielectric cylinder is also considered. Behavior of transmitted field for these cases is analyzed with respect to different parameters of the geometry.