title: Enhanced triplet-triplet annihilation in bicomponent organic systems by using a gap plasmon resonator.
abstract: The triplet-triplet annihilation (TTA) efficiency in bicomponent organic systems is investigated by employing a gap plasmon resonator. In our structure, strong absorption peaks arising from coupling between localized surface plasmons and surface plasmon polaritons closely overlap the Q band of porphyrin, leading to higher triplet concentrations within the film. We find that at ultralow excitation intensities on the order of watts per square centimeter (W cm(-2)), TTA becomes predominant for the organic system on a gap plasmon resonator. A strong surface-enhanced Raman scattering intensity is observed in this substrate, verifying the near-field enhancement.
authors.affiliation: Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea. kohd94@kist.re.kr.
authors.forename: Jun Kue
authors.initials: JK
authors.lastname: Park
authors.forename: Gi Yong
authors.initials: GY
authors.lastname: Lee
authors.forename: Kinam
authors.initials: K
authors.lastname: Jung
authors.forename: Doo-Hyun
authors.initials: DH
authors.lastname: Ko
authors.forename: Il Ki
authors.initials: IK
authors.lastname: Han
authors.forename: Hyungduk
authors.initials: H
authors.lastname: Ko