Nonperturbative visualization of nanoscale plasmonic field distributions via photon localization microscopy

A. McLeod, A. Weber-Bargioni, Z. Zhang, S. Dhuey, B. Harteneck, J. B. Neaton, S. Cabrini, P. James Schuck

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

We demonstrate the nonperturbative use of diffraction-limited optics and photon localization microscopy to visualize the controlled nanoscale shifts of zeptoliter mode volumes within plasmonic nanostructures. Unlike tip- or coating-based methods for mapping near fields, these measurements do not affect the electromagnetic properties of the structure being investigated. We quantify the local field manipulation capabilities of asymmetric bowtie antennas, in agreement with theoretical calculations. The photon-limited localization accuracy of nanoscale mode positions is determined for many of the measured devices to be within a 95% confidence interval of +/-2.5nm. This accuracy also enables us to characterize the effects of nm-scale fabrication irregularities on local plasmonic mode distributions.

Original languageEnglish (US)
Article number037402
JournalPhysical review letters
Volume106
Issue number3
DOIs
StatePublished - Jan 18 2011
Externally publishedYes

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