Refractive index sensing using quasi one-dimensional nanoslit arrays

Min Hyung Lee, Hanwei Gao, Teri W. Odom

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


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
Pages (from-to)2584-2588
Number of pages5
JournalNano letters
Issue number7
Publication statusPublished - Jul 8 2009

ASJC Scopus subject areas

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

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