• Editors' Suggestion

Nanoscale probing of resonant photonic modes in dielectric nanoparticles with focused electron beams

Qianlang Liu, Steven C. Quillin, David J. Masiello, and Peter A. Crozier
Phys. Rev. B 99, 165102 – Published 3 April 2019
PDFHTMLExport Citation

Abstract

Understanding the optical responses of nanostructures with high spatial resolution is paramount in photonic engineering. The excitation of resonant optical-frequency geometric modes in oxide nanoparticles is explored using monochromated electron energy-loss spectroscopy in a scanning transmission electron microscope. These geometric or cavity modes are found to produce a progression of resonance peaks within the bandgap regions of the electron energy-loss spectra of CeO2, TiO2, and MgO nanoparticles. Complementary simulations of the electron probe combined with analytic Mie analysis are performed to interpret the complex spectral features and to understand their underlying physical origins. The factors that influence the energies, shapes, and strengths of these modes are also investigated and their dependence upon nanoparticle size, geometry, refractive index, aggregation, impact parameter, and electron kinetic energy are elucidated. Taken together, this work demonstrates the unique ability of fast electron spectroscopy to determine the photonic density of states in individual and complex assemblies of dielectric nanoparticles.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 16 October 2018
  • Revised 17 February 2019

DOI:https://doi.org/10.1103/PhysRevB.99.165102

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Qianlang Liu1, Steven C. Quillin2, David J. Masiello2,*, and Peter A. Crozier1,†

  • 1School for the Engineering of Matter, Transport and Energy, Arizona State University, 501 E. Tyler Mall, Tempe, Arizona 85287-6106, USA
  • 2Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, USA

  • *Corresponding author: masiello@chem.washington.edu
  • Corresponding author: crozier@asu.edu

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 99, Iss. 16 — 15 April 2019

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×