title: Enhanced bandwidth and reduced dispersion through stacking multiple optical metamaterials.
abstract: All-semiconductor, highly anisotropic metamaterials provide a straightforward path to negative refraction in the mid-infrared. However, their usefulness in applications is restricted by strong frequency dispersion and limited spectral bandwidth. In this work, we show that by stacking multiple metamaterials of varying thickness and doping into one compound metamaterial, bandwidth is increased by 27% over a single-stack metamaterial, and dispersion is reduced.
authors.affiliation: Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, USA. escarra@princeton.edu
authors.forename: Matthew D
authors.initials: MD
authors.lastname: Escarra
authors.forename: Sukosin
authors.initials: S
authors.lastname: Thongrattanasiri
authors.forename: William O
authors.initials: WO
authors.lastname: Charles
authors.forename: Anthony J
authors.initials: AJ
authors.lastname: Hoffman
authors.forename: Viktor A
authors.initials: VA
authors.lastname: Podolskiy
authors.forename: Claire
authors.initials: C
authors.lastname: Gmachl
mesh_terms: D016880:Anisotropy; D007259:Infrared Rays; D008027:Light; D008422:Materials Testing; D015233:Models, Statistical; D055095:Optics and Photonics; D012031:Refractometry / Q000379:methods; D012542:Scattering, Radiation; D012666:Semiconductors; D014961:X-Ray Diffraction