title: Modeling molecular effects on plasmon transport: silver nanoparticles with tartrazine.
abstract: Modulation of plasmon transport between silver nanoparticles by a yellow fluorophore, tartrazine, is studied theoretically. The system is studied by combining a finite-difference time-domain Maxwell treatment of the electric field and the plasmons with a time-dependent parameterized method number 3 simulation of the tartrazine, resulting in an effective Maxwell∕Schrödinger (i.e., classical∕quantum) method. The modeled system has three linearly arranged small silver nanoparticles with a radius of 2 nm and a center-to-center separation of 4 nm; the molecule is centered between the second and third nanoparticles. We initiate an x-polarized current on the first nanoparticle and monitor the transmission through the system. The molecule rotates much of the x-polarized current into the y-direction and greatly reduces the overall transmission of x-polarized current.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, USA.
authors.forename: Christopher
authors.initials: C
authors.lastname: Arntsen
authors.forename: Kenneth
authors.initials: K
authors.lastname: Lopata
authors.forename: Michael R
authors.initials: MR
authors.lastname: Wall
authors.forename: Lizette
authors.initials: L
authors.lastname: Bartell
authors.forename: Daniel
authors.initials: D
authors.lastname: Neuhauser