Tunable Lattice Plasmon Resonances in 1D Nanogratings

Yi Hua, Ahmad K. Fumani, Teri W Odom

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Lattice plasmon resonances or surface lattice resonances (SLRs) supported in two-dimensional (2D) metal nanoparticle arrays have extremely narrow line widths and highly localized electric field enhancements, which are key properties for realizing plasmon lasers and hybrid solid-state lighting devices. This paper reports lattice plasmons in one-dimensional (1D) metal nanogratings with broadband tunability (over 400 nm) far beyond their 2D counterparts at visible wavelengths. The large wavelength tunabilities of 1D or line-SLRs are from the lower symmetry of the structures compared to 2D arrays based on nanoparticles. We demonstrate that line-SLRs exhibit a Fano-like character based on coupling between an out-of-plane plasmon excitation and 1D Bragg diffraction modes. We show how the height and periodicity of the grating determine the spectral properties of the line-SLRs. By adjusting the line height, we achieved high-quality lattice resonances, even in index-mismatched environments.

Original languageEnglish
Pages (from-to)322-326
Number of pages5
JournalACS Photonics
Volume6
Issue number2
DOIs
Publication statusPublished - Feb 20 2019

Keywords

  • Fano resonance
  • lattice plasmon resonance
  • nanograting
  • out-of-plane charge oscillations
  • surface lattice resonance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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