title: Infrared spatial and frequency selective metamaterial with near-unity absorbance.
abstract: We demonstrate, for the first time, a spatially dependent metamaterial perfect absorber operating in the infrared regime. We achieve an experimental absorption of 97% at a wavelength of 6.0   μm, and our results agree well with numerical full-wave simulations. By using two different metamaterial sublattices we experimentally demonstrate a spatial and frequency varying absorption which may have many relevant applications, including hyperspectral subsampling imaging.
authors.affiliation: Department of Physics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, Massachusetts 02467, USA.
authors.forename: Xianliang
authors.initials: X
authors.lastname: Liu
authors.forename: Tatiana
authors.initials: T
authors.lastname: Starr
authors.forename: Anthony F
authors.initials: AF
authors.lastname: Starr
authors.forename: Willie J
authors.initials: WJ
authors.lastname: Padilla