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Low-cost and large-size nanoplasmonic sensor based on Fano resonances with fast response and high sensitivity

AuthorsBaquedano, E.; González, M. U.; Paniagua-Domínguez, R. ; Sánchez-Gil, José A. ; Postigo, Pablo Aitor
Issue Date28-Jun-2017
PublisherOptical Society of America
CitationOptics Express 25: 15967-15976 (2017)
AbstractWe have developed a low-cost, fast and sensitive plasmonic sensor with a large-size for easy handling. The sensor is formed by a Au nanobelt grating fabricated by soft lithography with a period of 780 nm and a width of 355 nm in an even and uniform area of ~2 × 2 cm2. The sensor uses the Fano-shaped third order mode localized plasmon resonance of the Au nanobelts, which appears in the visible part of the transmission spectrum. We have found a detection resolution of 1.56 × 10¿5 refractive index units with a temporal resolution of 1 s in a sensing area of 0.75 × 0.75 mm2. The high uniformity and size of the sensor permit the detection using a simple optical system, which provides the device with the potential to be used as an easy to handle, portable and disposable sensor.
Description10 pags., 4 figs. -- OCIS codes: (130.6010) Sensors; (240.6680) Surface plasmons; (250.5403) Plasmonics; (350.2770) Gratings.
Publisher version (URL)https://doi.org/10.1364/OE.25.015967
Identifiersdoi: 10.1364/OE.25.015967
issn: 1094-4087
Appears in Collections:(IMN-CNM) Artículos
(CFMAC-IEM) Artículos
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