title: Metal/dielectric/metal sandwich film for broadband reflection reduction.
abstract: A film comprising randomly distributed metal/dielectric/metal sandwich nanopillars with a distribution of cross-sectional diameters, displayed extremely low reflectance over the blue-to-red regime, when coated on glass and illuminated normally. When it is illuminated by normally incident light, this sandwich film (SWF) has a low extinction coefficient, its phase thickness is close to a negative wavelength in the blue-to-red spectral regime, and it provides weakly dispersive forward and backward impedances, so that reflected waves from the two faces of the SWF interfere destructively. Broadband reflection-reduction, over a wide range of incidence angles and regardless of the polarization state of the incident light, was observed when the SWF was deposited on polished silicon.
authors.affiliation: Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 106, Taiwan.
authors.forename: Yi-Jun
authors.initials: YJ
authors.lastname: Jen
authors.forename: Akhlesh
authors.initials: A
authors.lastname: Lakhtakia
authors.forename: Meng-Jie
authors.initials: MJ
authors.lastname: Lin
authors.forename: Wei-Hao
authors.initials: WH
authors.lastname: Wang
authors.forename: Huang-Ming
authors.initials: HM
authors.lastname: Wu
authors.forename: Hung-Sheng
authors.initials: HS
authors.lastname: Liao
mesh_terms: D017097:Electric Impedance; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D008027:Light; D008422:Materials Testing; D008567:Membranes, Artificial; D008670:Metals / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation
chemical_list: D008567:Membranes, Artificial; D008670:Metals