Refractive index sensing using quasi one-dimensional nanoslit arrays

Min Hyung Lee; Hanwei Gao; Teri W. Odom

doi:10.1021/nl900773m

Refractive index sensing using quasi one-dimensional nanoslit arrays

Min Hyung Lee, Hanwei Gao, Teri W. Odom

Chemistry

Research output: Contribution to journal › Article › peer-review

28 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 language	English (US)
Pages (from-to)	2584-2588
Number of pages	5
Journal	Nano letters
Volume	9
Issue number	7
DOIs	https://doi.org/10.1021/nl900773m
State	Published - Jul 8 2009

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Mechanical Engineering
Bioengineering
General Materials Science

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10.1021/nl900773m

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AB - 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.

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Refractive index sensing using quasi one-dimensional nanoslit arrays

Abstract

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