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Study of prism surface plasmon resonance effect based on dielectric-aided layer

Zhang Qian-Yun Zeng Jie Li Ji-Feng Zhou Ya-Bin Zhang Xian-Hui Cao Hai-Dong

Study of prism surface plasmon resonance effect based on dielectric-aided layer

Zhang Qian-Yun, Zeng Jie, Li Ji-Feng, Zhou Ya-Bin, Zhang Xian-Hui, Cao Hai-Dong
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Publishing process
  • Received Date:  26 July 2013
  • Accepted Date:  26 September 2013
  • Published Online:  05 February 2014

Study of prism surface plasmon resonance effect based on dielectric-aided layer

  • 1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant No. 51275239), the Funds for International Cooperation and Exchange of the National Natural Science Foundation of China (Grant No. 51161120326), the Aviation Science Foundation of China (Grant No. 20125652055), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 2012321811003), and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

Abstract: A prism surface plasmon resonance (SPR) incentive model based on the dielectric-aided layer structure is studied. The model consists of four structure layers: prism-dielectric-aided layer-gold-environmental media. According to the thin film optics and waveguide theory, the excited mechanism and modulation characteristic of SPR effect are explored based on resonance composite film composed of dielectric-aided layer and gold film. Numerical simulation is conducted on the relation of layer thickness, film dispersion characteristics and resonance energy transfer by the finite difference time domain method. Thereby, the wavelength modulation prism dielectric-aided layer SPR excitation system is also developed. Results show that with the same refractive index of liquid, the SPR resonance spectrum of dielectric-aided layer incentive model shifts to the longer wavelength region and the resonant halfwave width is wider than the spectrum of common Kretschmann incentive model based on prism-gold-environmental media. With increasing refractive index, the SPR resonance spectrum redshifts, and its sensitity is 75% higher than the common incentive model. The designed model can effectively improve the sensitivity of the prism surface plasmon resonance effect, and in the areas such as high sensitivity detection, new types of optical filter, the modulator and other fields the SPR technology may provide a theoretical and practical basis.

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