title: Optical isolation with epsilon-near-zero metamaterials.
abstract: We suggest a principle for isolation of circularly polarized waves in magnetically active extreme-parameter metamaterials. Using theoretical analysis and numerical simulations, we show that metamaterials with extreme parameters, such as epsilon-near-zero materials (ENZ), when merged with magneto-optical materials, become transparent for forward circularly polarized waves of a given handedness and opaque for backward propagating waves of the same handedness. We theoretically study two possible implementations of such hybrid materials: (1) the case of metal-dielectric stacks; and (2) rectangular waveguide near its cut-off frequency. We prove that these structures can be utilized as compact isolators for circularly polarized waves.
authors.affiliation: Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. davoyan@seas.upenn.edu
authors.forename: Arthur R
authors.initials: AR
authors.lastname: Davoyan
authors.forename: Ahmed M
authors.initials: AM
authors.lastname: Mahmoud
authors.forename: Nader
authors.initials: N
authors.lastname: Engheta
mesh_terms: D003198:Computer Simulation; D008027:Light; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D008962:Models, Theoretical; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation
chemical_list: D058185:Magnetite Nanoparticles