Optical sensing of analytes in aqueous solutions with a multiple surface-plasmon-polariton-wave platform

Stephen E. Swiontek, Drew P. Pulsifer, Akhlesh Lakhtakia

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

The commonly used optical sensor based on surface plasmon-polariton wave phenomenon can sense just one chemical, because only one SPP wave can be guided by the interface of a metal and a dielectric material contained in the sensor. Multiple analytes could be detected and/or the sensing reliability for a single analyte could be enhanced, if multiple SPP-wave modes could be excited on a single metal/dielectric interface. For that to happen, the partnering dielectric material must be periodically non-homogeneous. Using a chiral sculptured thin film (CSTF) as that material in a SPP-wave platform, we show that the angular locations of multiple SPP-wave modes shift when the void regions of the CSTF are infiltrated with a fluid. The sensitivities realized in the proof-of-concept experiments are comparable to state-of-research values.

Original languageEnglish (US)
Article number1409
JournalScientific reports
Volume3
DOIs
StatePublished - 2013

All Science Journal Classification (ASJC) codes

  • General

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