Direct measurement of dispersion relation for surface plasmon-polaritons on silver nanoantennas

Hikaru Saito, Hiroki Kurata

Research output: Contribution to journalLetter

7 Citations (Scopus)

Abstract

We investigated the degree to which the dispersion relation of surface plasmon-polaritons excited on silver nanoantennas depends on length. To accomplish this, dispersion measurements for individual silver nanoantennas with lengths from 220 nm to 2.5 μm were performed using angle-resolved electron energy-loss spectroscopy (AREELS) and spatially resolved EELS (SREELS). AREELS enabled measurements of the dispersion relation extending into the high-energy region of 2.6 eV for a 2.5-μm-long silver nanoantenna, without the need to excite Fabry–Perot-type resonances. Our experiments showed that the dispersion relation of silver nanoantennas that have the same diameter is independent of their individual lengths.

Original languageEnglish
Pages (from-to)155-159
Number of pages5
JournalMicroscopy
Volume63
Issue number2
DOIs
Publication statusPublished - Jan 1 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Structural Biology
  • Instrumentation
  • Radiology Nuclear Medicine and imaging

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