Compliant Metamaterials for Resonantly Enhanced Infrared Absorption Spectroscopy and Refractive Index Sensing

Metamaterials can be designed to operate at frequencies from the visible to the mid-IR, making these structures useful for both refractive index sensing and surface-enhanced infrared absorption spectroscopy. Here we investigate how the mechanical deformation of compliant metamaterials can be used to...

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Bibliographic Details
Published inACS nano Vol. 5; no. 10; pp. 8167 - 8174
Main Authors Pryce, Imogen M, Kelaita, Yousif A, Aydin, Koray, Atwater, Harry A
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 25.10.2011
Subjects
Detection
Infrared
Infrared absorption
Metamaterials
Nanostructure
Refractive index
Refractivity
Spectroscopy
Surface chemistry
refractive index sensing
polymers
active metamaterials
plasmonics
surface-enhanced spectroscopy
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Summary:Metamaterials can be designed to operate at frequencies from the visible to the mid-IR, making these structures useful for both refractive index sensing and surface-enhanced infrared absorption spectroscopy. Here we investigate how the mechanical deformation of compliant metamaterials can be used to create new types of tunable sensing surfaces. For split ring resonator based metamaterials on polydimethylsiloxane we demonstrate refractive index sensing with figures of merit of up to 10.1. Given the tunability of the resonance of these structures through the infrared after fabrication, they are well suited for detection of the absorption signal of many typical vibrational modes. The results highlight the promise of postfabrication tunable sensors and the potential for integration.
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ISSN:1936-0851
1936-086X
DOI:10.1021/nn202815k