title: Chiral poly(fluorene-alt-benzothiadiazole) (PFBT) and nanocomposites with gold nanoparticles: plasmonically and structurally enhanced chirality.
abstract: Materials with large chiral optical activity at visible wavelengths are of great interest in photonics, particularly as a route to chiral optical metamaterials. Here, we demonstrate the plasmonic enhancement of the chiral optical activity of chiral poly(fluorene-alt-benzothiadiazole) (PFBT) doped with gold nanoparticles. The supramolecular helical organization of polymeric chains with simultaneous dipole-dipole interaction of the helically ordered nanoparticles with the polymer and one another results in unprecedented values of chirality parameter (κ ~0.02) at visible wavelengths in thin films.
authors.affiliation: Institute for Lasers, Photonics and Biophotonics, Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA.
authors.forename: Heong Sub
authors.initials: HS
authors.lastname: Oh
authors.forename: Sha
authors.initials: S
authors.lastname: Liu
authors.forename: HongSub
authors.initials: H
authors.lastname: Jee
authors.forename: Alexander
authors.initials: A
authors.lastname: Baev
authors.forename: Mark T
authors.initials: MT
authors.lastname: Swihart
authors.forename: Paras N
authors.initials: PN
authors.lastname: Prasad