Dual Strong Couplings Between TPPS J-Aggregates and Aluminum Plasmonic States

Hiroaki Misawa, Tomoya Oshikiri, Jingchun Guo, Uehara Hiyori, Ueno Kosei, Jie Li

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We report on the spectral properties of strong coupling between the localized surface plasmon resonances (LSPRs) of aluminum (Al) nanostructures and tetraphenylporphyrin tetrasulfonic acid hydrate (TPPS) J-aggregates. Because of their wide spectral range of LSPR bands from ultraviolet to near-infrared wavelengths by controlling structural size, Al nanodisks can realize strong coupling with different excitons of TPPS J-aggregates. The Rabi splitting energies of the excitons based on Soret and Qbands are 300 and 180 meV, respectively. In addition to extinction spectrum, we have also measured an excitation spectrum to determine the essential absorption of the hybrid states and successfully confirmed a shoulder peak corresponding to a lower branch of hybrid states. In Al nanorod systems, strong coupling with two excitons can also be selectively induced by merely rotating the polarization of the incident light, which constituted a simple platform for the dynamic control of exciton/plasmon coupling states.
Original languageEnglish
Pages (from-to)2786-2791
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume7
Issue number14
DOIs
StatePublished - 21 Jul 2016

Keywords

  • NEAR-INFRARED WAVELENGTHS; LOCALIZED SURFACE-PLASMON; PHOTOCURRENT GENERATION; METAL NANOSTRUCTURES; VISIBLE-LIGHT; GOLD; DYNAMICS; DEVICES; ARRAYS; NANOPARTICLES

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