title: Plasmon-Polaron Coupling in Conjugated Polymer on Infrared Nanoantennas.
abstract: We propose and demonstrate a novel type of coupling between polarons in a conjugated polymer and localized surface plasmons in infrared (IR) nanoantennas. The near-field interaction between plasmons and polarons is revealed by polarized photoinduced absorption measurements, probing mid-IR polaron transitions, and infrared-active vibrational modes of the polymer, which directly gauge the density of photogenerated charge carriers. This work proves the possibility of tuning the polaronic properties of organic semiconductors with plasmonic nanostructures.
authors.affiliation: †Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371.|‡Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371.
authors.forename: Zilong
authors.initials: Z
authors.lastname: Wang
authors.affiliation: §4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhao
authors.affiliation: §4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.
authors.forename: Bettina
authors.initials: B
authors.lastname: Frank
authors.affiliation: †Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371.
authors.forename: Qiandong
authors.initials: Q
authors.lastname: Ran
authors.affiliation: ‡Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371.
authors.forename: Giorgio
authors.initials: G
authors.lastname: Adamo
authors.affiliation: ‡Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371.|§4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.
authors.forename: Harald
authors.initials: H
authors.lastname: Giessen
authors.affiliation: †Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371.|‡Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371.
authors.forename: Cesare
authors.initials: C
authors.lastname: Soci
keywords: IR nanoantennas; Localized surface plasmons; conjugated polymer; polarons