Surface plasmon resonance optical sensor by using a Ag-SnO2 thin film layer
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1.
Department of Physics, Hainan Normal University, Haikou 571158, China;
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2.
College of Optics and Electron Information Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
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Received Date:
2006-03-16
Accepted Date:
2006-05-14
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Abstract
To study the influence of the different CuO concentration rates on the resonance angle,a novel surface plasmon resonance(SPR) optical sensor coated a combined Ag and SnO2(dropped by CuO) film is proposed.Four-layer films Ag(50nm),SnO2(50nm),CuO and SnO2(50nm) were prepared deposition on rutile prism in turn by means of RF-reactive-sputtering,and the thickness of the CuO was various with the concentration rate,and the combined film was formed after being annealed.The SPR experiments show that,when the concentration rates of the CuO are 0,0.01 and 0.05,the resonance angles are 59.61°,60.52°和61.3°,respectively.The faster concentration rate of the CuO,the larger of the resonance angle.
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