title: Overcoming the losses of a split ring resonator array with gain.
abstract: We present a computational approach, allowing for a self-consistent treatment of a split ring resonator (SRR) array with a gain layer underneath. We apply three different pumping schemes on the gain layer: (1) homogeneously pumped isotropic gain, (2) homogeneously pumped isotropic gain with a shadow cast by the SRR and (3) anisotropic gain pumped in a selected direction only. We show numerically the magnetic losses of the SRR can be compensated by the gain. The difference on loss compensations among the three pumping schemes is analyzed by the electric field distribution. Studies also show the dielectric background of gain does not affect the loss compensation much for the gain only pumped in the direction parallel to the SRR plane.
authors.affiliation: Department of Physics and Astronomy and Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA.
authors.forename: Anan
authors.initials: A
authors.lastname: Fang
authors.forename: Zhixiang
authors.initials: Z
authors.lastname: Huang
authors.forename: Thomas
authors.initials: T
authors.lastname: Koschny
authors.forename: Costas M
authors.initials: CM
authors.lastname: Soukoulis
mesh_terms: D016880:Anisotropy; D001152:Arsenicals / Q000737:chemistry; D003198:Computer Simulation; D005708:Gallium / Q000737:chemistry; D008962:Models, Theoretical; D049329:Nanostructures; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods*; D055095:Optics and Photonics / Q000295:instrumentation / Q000379:methods*; D012834:Silver / Q000737:chemistry
chemical_list: D001152:Arsenicals; C043055:gallium arsenide; D012834:Silver; D005708:Gallium