IEEE Photonics Journal (Jan 2011)

Improved Performance of Nanohole Surface Plasmon Resonance Sensors by the Integrated Response Method

  • Mandira Das,
  • Donna Hohertz,
  • Rajinder Nirwan,
  • Alexandre G. Brolo,
  • Karen L. Kavanagh,
  • Reuven Gordon

DOI
https://doi.org/10.1109/JPHOT.2011.2143702
Journal volume & issue
Vol. 3, no. 3
pp. 441 – 449

Abstract

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We examine both experimental and simulated data of the optical transmission response of nanohole arrays in metal films to bulk and surface refractive index changes. We compare the signal-to-noise performance of the following three different analysis methods: the conventional peak shift method, a normalized-difference integrated-response method that is commonly used in 3-D plasmonic crystals, and an integrated response (IR) method. Our IR method shows a 40% and 90% improvement in the signal-to-noise ratio (SNR) for bulk and surface binding tests, respectively, compared with the direct measurement of the transmission-peak wavelength shift, promising improved sensing performance for future nanohole-array sensor applications.

Keywords