title: Optical Metacages.
abstract: We suggest a novel strategy for spectrally selective optical shielding of arbitrary shaped volumes by arranging specifically designed two- or three-layer nanowires around an area that needs to be protected. We show that such nanowire shields preserve their functionality for almost arbitrary geometry, and we term such structures optical metacages. We analyze several designs of such optical metacages made from either metallic or dielectric materials with experimentally measured parameters. We employ a semianalytical approach and also verify our results by numerical simulations. We further study optical properties of the introduced metacages in both near- and far-field regions, as well as analyze their frequency selectivity and the vanishing backscattering regime.
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, ACT 2601, Australia.
authors.forename: Ali
authors.initials: A
authors.lastname: Mirzaei
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, ACT 2601, Australia.
authors.forename: Andrey E
authors.initials: AE
authors.lastname: Miroshnichenko
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, ACT 2601, Australia.
authors.forename: Ilya V
authors.initials: IV
authors.lastname: Shadrivov
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, ACT 2601, Australia.
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar