Refractive index sensing using quasi one-dimensional nanoslit arrays

Min Hyung Lee, Hanwei Gao, Teri W. Odom

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

This letter describes the optical properties of quasi one-dimensional (1D) Au nanoslit arrays on a microscale pitch. The transmission spectra exhibited multiple minima that were well characterized by 1D surface plasmon polariton Bloch wave modes. We found that all higher order modes showed a linear response to small changes of refractive index (RI) with sensitivities up to 560 nm per RI unit, which is comparable to that of two-dimensional nanohole arrays. By calibrating the RI response of the nanoslit arrays, we could use the multiple modes to determine the RI of unknown, nonabsorbing solutions.

Original languageEnglish (US)
Pages (from-to)2584-2588
Number of pages5
JournalNano letters
Volume9
Issue number7
DOIs
StatePublished - Jul 8 2009

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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