title: Metamaterial frequency-selective superabsorber.
abstract: Using transformation optics a frequency-selective superabsorber can be constructed that consists of an absorbing core material coated with a shell of isotropic double negative metamaterial. For a fixed volume its absorption cross section can be made arbitrarily large at one frequency. The double-negative shell serves to amplify the evanescent tail of the high-order cylindrical waves, which induces strong scattering and absorption. Our conclusion is supported by both analytical Mie theory and numerical finite-element simulation. Interesting applications of such a device are discussed.
authors.affiliation: Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China. jack@ust.hk
authors.forename: Jack
authors.initials: J
authors.lastname: Ng
authors.forename: Huanyang
authors.initials: H
authors.lastname: Chen
authors.forename: C T
authors.initials: CT
authors.lastname: Chan