title: Nanofiber frequency doublers.
abstract: Nanoscaled, needle-shaped frequency doublers have been generated via self-assembled surface growth from functionalized quaterphenylene molecules with a designed large hyperpolarizability. The nanofiber frequency doublers exhibit very weak fluorescence centered around 430 nm but emit a strong, resonance-enhanced second-harmonic signal when excited with infrared 80 fs laser pulses. The frequency doublers are employed to correlate second-harmonic response and morphology via two-dimensional true second-harmonic images of individual nanoaggregates obtained with the help of a femtosecond laser scanning microscope.
authors.affiliation: Department of Chemistry and Physics, University of Southern Denmark, DK-5230 Odense M, Denmark.
authors.forename: J
authors.initials: J
authors.lastname: Brewer
authors.forename: M
authors.initials: M
authors.lastname: Schiek
authors.forename: A
authors.initials: A
authors.lastname: Lützen
authors.forename: K
authors.initials: K
authors.lastname: Al-Shamery
authors.forename: H-G
authors.initials: HG
authors.lastname: Rubahn