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Simultaneous excitation of cavity resonance and surface plasmon resonance in Ag/Al2O3/Ag layer structure

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Abstract

Simultaneous excitation of cavity resonance (CR) and surface plasmon resonance (SPR) was observed in the angular spectrum by substituting Ag/Al2O3/Ag layers for the metal film in a Kretschmann structure. Two reflective valleys, elicited respectively by CR and SPR, appeared at different positions in the angular spectrum. The former is the sum of enhanced transmission of CR and absorption of the metal, expressed in the reflection spectrum and extremely insensitive to the changes of the surface environment (refractive index). The latter behavior is like that when two metal films are stuck together: it has almost the same resonance depth and width, and is extremely sensitive to the changes of the surface environment. Moreover, two SPR peaks could be excited simultaneously at one angle but with different wavelengths in the frequency spectrum, which is not seen in traditional Kretschmann structures.

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Authors and Affiliations

  1. Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing, 100875, China

    R. Zhao, T. Zhai, Z. Wang & D. Liu

  2. Institute of Modern Physics, School of Science, Xian Jiaotong University, Xian, 710049, China

    Y. Wang

Authors
  1. R. Zhao
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  2. T. Zhai
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  3. Z. Wang
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  4. Y. Wang
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  5. D. Liu
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Correspondence to D. Liu.

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Zhao, R., Zhai, T., Wang, Z. et al. Simultaneous excitation of cavity resonance and surface plasmon resonance in Ag/Al2O3/Ag layer structure. Appl. Phys. B 92, 585–588 (2008). https://doi.org/10.1007/s00340-008-3105-4

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  • DOI: https://doi.org/10.1007/s00340-008-3105-4

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