title: Optical properties of ultrafine line and space polymeric nanogratings coated with metal and metal-dielectric-metal thin films.
abstract: Noble metal and metal-dielectric-metal ultrathin films were deposited on the surfaces of ultrafine polymeric nanogratings, which were fabricated using nanoimprint lithography. Experimental results showed dramatic differences of the surface morphologies for single metal and triple metal-dielectric-metal films deposited on flat and corrugated polymeric surfaces. The effect of the surface morphology on the optical properties was hence investigated and analyzed under linearly polarized light. The surface plasmon resonances of single metal and triple metal-dielectric-metal films deposited on polymeric nanograting surfaces were also characterized based on the Kretschmann prism-coupling method. The single metal and triple metal-dielectric-metal films deposited on polymeric nanograting surfaces are important for the study of photon-plasmon interactions (i.e. couplings and conversions) at the interfaces between a nanograting and metal films.
authors.affiliation: Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore.
authors.forename: Eunice Sok Ping
authors.initials: ES
authors.lastname: Leong
authors.forename: Siji
authors.initials: S
authors.lastname: Wu
authors.forename: Nan
authors.initials: N
authors.lastname: Zhang
authors.forename: Wei Wei
authors.initials: WW
authors.lastname: Loh
authors.forename: Eng Huat
authors.initials: EH
authors.lastname: Khoo
authors.forename: Guang Yuan
authors.initials: GY
authors.lastname: Si
authors.forename: Hai Tao
authors.initials: HT
authors.lastname: Dai
authors.forename: Yan Jun
authors.initials: YJ
authors.lastname: Liu