Bimetallic silver-gold film waveguide surface plasmon resonance sensor
It is desirable that a surface plasmon resonance (SPR) sensor is highly sensitive to binding interactions within the sensing region, generate evanescent fields with long penetration depths, and utilize a metal film that is very stable even in extreme environmental conditions. In this study, we prese...
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sg-ntu-dr.10356-904062020-03-07T13:57:24Z Bimetallic silver-gold film waveguide surface plasmon resonance sensor Ong, Biow Hiem Yuan, Xiaocong Tjin, Swee Chuan School of Electrical and Electronic Engineering Photonics Research Centre DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics It is desirable that a surface plasmon resonance (SPR) sensor is highly sensitive to binding interactions within the sensing region, generate evanescent fields with long penetration depths, and utilize a metal film that is very stable even in extreme environmental conditions. In this study, we present the first example of a wavelength-modulated waveguide SPR sensor with a bimetallic silver-gold film for surface plasmon excitation. The underlying silver yields better evanescent field enhancement of the sensing surface, while the overlying gold ensures that the stability of the metallic film is not compromised. It is shown experimentally that in terms of dλ/dn, the bimetallic film waveguide SPR configuration has a sensitivity of 1232 nm/RIU, greater than two times improvement from the 594 nm/RIU achievable with single gold film waveguide SPR sensor. The higher sensitivity, compact nature, and better evanescent field enhancement of this configuration provides the potential to biosensing applications. Published version 2009-01-05T03:01:02Z 2019-12-06T17:47:15Z 2009-01-05T03:01:02Z 2019-12-06T17:47:15Z 2007 2007 Journal Article Ong, B. H., Yuan, X., & Tjin, S. C. (2007). Bimetallic silver-gold film waveguide surface plasmon resonance sensor. Fiber and Integrated Optics, 26(4), 229-240. 0146-8030 1096-4681 https://hdl.handle.net/10356/90406 http://hdl.handle.net/10220/4368 http://sfxna09.hosted.exlibrisgroup.com:3410/ntu/sfxlcl3?sid=metalib:CSA_ELECTRONICS&id=doi:&genre=&isbn=&issn=0146-8030&date=2007&volume=26&issue=4&spage=229&epage=240&aulast=Ong&aufirst=%20Biow%20Hiem&auinit=&title=Fiber%20and%20Integrated%20Optics&atitle=Bimetallic%20Silver%2DGold%20Film%20Waveguide%20Surface%20Plasmon%20Resonance%20Sensor 10.1080/01468030701347106 en Fiber and integrated optics © 2007 Taylor & Francis This is the author created version of a work that has been peer reviewed and accepted for publication by Fiber and Integrated Optics, Taylor & Francis. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1080/01468030701347106]. 12 p. text/html |
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DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics Ong, Biow Hiem Yuan, Xiaocong Tjin, Swee Chuan Bimetallic silver-gold film waveguide surface plasmon resonance sensor |
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It is desirable that a surface plasmon resonance (SPR) sensor is highly sensitive to binding interactions within the sensing region, generate evanescent fields with long penetration depths, and utilize a metal film that is very stable even in extreme environmental conditions. In this study, we present the first example of a wavelength-modulated waveguide SPR sensor with a bimetallic silver-gold film for surface plasmon excitation. The underlying silver yields better evanescent field enhancement of the sensing surface, while the overlying gold ensures that the stability of the metallic film is not compromised. It is shown experimentally that in terms of dλ/dn, the bimetallic film waveguide SPR configuration has a sensitivity of 1232 nm/RIU, greater than two times improvement from the 594 nm/RIU achievable with single gold film waveguide SPR sensor. The higher sensitivity, compact nature, and better evanescent field enhancement of this configuration provides the potential to biosensing applications. |
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School of Electrical and Electronic Engineering |
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School of Electrical and Electronic Engineering Ong, Biow Hiem Yuan, Xiaocong Tjin, Swee Chuan |
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Article |
author |
Ong, Biow Hiem Yuan, Xiaocong Tjin, Swee Chuan |
author_sort |
Ong, Biow Hiem |
title |
Bimetallic silver-gold film waveguide surface plasmon resonance sensor |
title_short |
Bimetallic silver-gold film waveguide surface plasmon resonance sensor |
title_full |
Bimetallic silver-gold film waveguide surface plasmon resonance sensor |
title_fullStr |
Bimetallic silver-gold film waveguide surface plasmon resonance sensor |
title_full_unstemmed |
Bimetallic silver-gold film waveguide surface plasmon resonance sensor |
title_sort |
bimetallic silver-gold film waveguide surface plasmon resonance sensor |
publishDate |
2009 |
url |
https://hdl.handle.net/10356/90406 http://hdl.handle.net/10220/4368 http://sfxna09.hosted.exlibrisgroup.com:3410/ntu/sfxlcl3?sid=metalib:CSA_ELECTRONICS&id=doi:&genre=&isbn=&issn=0146-8030&date=2007&volume=26&issue=4&spage=229&epage=240&aulast=Ong&aufirst=%20Biow%20Hiem&auinit=&title=Fiber%20and%20Integrated%20Optics&atitle=Bimetallic%20Silver%2DGold%20Film%20Waveguide%20Surface%20Plasmon%20Resonance%20Sensor |
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