title: Photonic band gap effect and structural color from silver nanoparticle gelatin emulsion.
abstract: We have fabricated planar structures of silver nanoparticles in monochromatic gelatin emulsion with a continuous spacing ranging from 0.15-0.40 micron using a two-beam interference of a single laser source. Our planar holograms display a colorful "rainbow" pattern and photonic bandgaps covering the visible and IR ranges. We model the planar silver nanoparticle-gelatin composite system using an effective medium approach and good agreement is obtained between theory and experiment.
authors.affiliation: Department of Physics and Institute of Nano Science and Technology, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
authors.forename: Mang Hin
authors.initials: MH
authors.lastname: Kok
authors.forename: Rui
authors.initials: R
authors.lastname: Ma
authors.forename: Jeffrey Chi Wai
authors.initials: JC
authors.lastname: Lee
authors.forename: Wing Yim
authors.initials: WY
authors.lastname: Tam
authors.forename: C T
authors.initials: CT
authors.lastname: Chan
authors.forename: Ping
authors.initials: P
authors.lastname: Sheng
authors.forename: Kok Wai
authors.initials: KW
authors.lastname: Cheah