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

Author

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

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Victoria, Victoria, BC, Canada

Volume

3

Issue

3

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

441

Lastpage

449

Abstract

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

integrated optics; light transmission; metallic thin films; plasmonics; refractive index; surface plasmon resonance; 3D plasmonic crystals; bulk and surface refractive index changes; bulk binding tests; conventional peak shift method; different analysis methods; integrated response method; metal films; nanohole surface plasmon resonance sensors; normalized-difference integrated-response method; optical transmission response; signal-to-noise ratio; surface binding tests; transmission-peak wavelength shift; Optical surface waves; Plasmons; Refractive index; Sensors; Signal to noise ratio; Surface waves; Plasmonics; biosensors;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2011.2143702

Filename

5752212