Visualization of Plasmon-Exciton Interactions by Scanning Near-Field Optical Microscopy

Asami Yokozawa, Seiju Hasegawa, Keisuke Imaeda, Kohei Imura*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The electronic properties of a substance are perturbed by interactions of elementary excitations. The optical properties of the interacting states have been extensively studied and revealed to be correlated with the eigenfunctions of the isolated systems. On the other hand, the spatial characteristics of the states have been little studied because of the diffraction limit of light. In this study, we examine plasmon and exciton interactions in silver nanoplate and organic J-aggregate hybrid structures using scanning near-field optical microscopy. We reveal that the light transmission is enhanced when the plasmon and exciton resonantly interact with each other. We visualize the spatial distribution of the interacting states and find that the interaction of the high-order plasmons with the exciton enables manipulation of the electronic states in a spatially resolved manner. This study demonstrates that the optical field can be spatially controlled via coupling of the elementary excitations.

Original languageEnglish
Pages (from-to)24515-24520
Number of pages6
JournalJournal of Physical Chemistry C
Volume125
Issue number44
DOIs
Publication statusPublished - 2021 Nov 11

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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