title: Optimization of broadband optical response of multilayer nanospheres.
abstract: We propose an optimization-based theoretical approach to tailor the optical response of silver/silica multilayer nanospheres over the visible spectrum. We show that the structure that provides the largest cross-section per volume/mass, averaged over a wide frequency range, is the silver coated silica sphere. We also show how properly chosen mixture of several species of different nanospheres can have an even larger minimal cross-section per volume/mass over the entire visible spectrum.
authors.affiliation: Department of Physics, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
authors.forename: Wenjun
authors.initials: W
authors.lastname: Qiu
authors.forename: Brendan G
authors.initials: BG
authors.lastname: DeLacy
authors.forename: Steven G
authors.initials: SG
authors.lastname: Johnson
authors.forename: John D
authors.initials: JD
authors.lastname: Joannopoulos
authors.forename: Marin
authors.initials: M
authors.lastname: Soljačić