title: Randomness in highly reflective silver nanoparticles and their localized optical fields.
abstract: Reflection of near-infrared light is important for preventing heat transfer in energy saving applications. A large-area, mass-producible reflector that contains randomly distributed disk-shaped silver nanoparticles and that exhibits high reflection at near-infrared wavelengths was demonstrated. Although resonant coupling between incident light and the nanostructure of the reflector plays some role, what is more important is the geometrical randomness of the nanoparticles, which serves as the origin of a particle-dependent localization and hierarchical distribution of optical near-fields in the vicinity of the nanostructure. Here we show and clarified the unique optical near-field processes associated with the randomness seen in experimentally fabricated silver nanostructures by adapting a rigorous theory of optical near-fields based on an angular spectrum and detailed electromagnetic calculations.
authors.affiliation: 1] Photonic Network Research Institute, National Institute of Information and Communications Technology, 4-2-1 Nukui-kita, Koganei, Tokyo 184-8795, Japan [2] Nanophotonics Research Center, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Naruse
authors.affiliation: Frontier Core-Technology Laboratories, Research and Development Management Headquarters, Fujifilm Corporation, Nakanuma, Minamiashigara, Kanagawa 250-0193, Japan.
authors.forename: Takeharu
authors.initials: T
authors.lastname: Tani
authors.affiliation: Frontier Core-Technology Laboratories, Research and Development Management Headquarters, Fujifilm Corporation, Nakanuma, Minamiashigara, Kanagawa 250-0193, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Yasuda
authors.affiliation: 1] Nanophotonics Research Center, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan [2] Department of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Naoya
authors.initials: N
authors.lastname: Tate
authors.affiliation: 1] Nanophotonics Research Center, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan [2] Department of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Motoichi
authors.initials: M
authors.lastname: Ohtsu
authors.affiliation: Frontier Core-Technology Laboratories, Research and Development Management Headquarters, Fujifilm Corporation, Nakanuma, Minamiashigara, Kanagawa 250-0193, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Naya