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Chinese Optics Letters, Vol. 17, Issue 4, 042801-1 (2019)

Theoretical study on negative permittivity of the material producing sharp surface plasmon resonance dips

Dejing Gong1,2, Yinquan Yuan1,*, Lei Liang1,2, and Minghong Yang1,**

Author Affiliations

  • 1National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China
  • 2School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China

Abstract

Using theoretical simulations for optical fiber surface plasmon resonance (SPR) sensors and prism-based SPR sensors coated with negative permittivity material (NPM), we investigated the effect of the permittivity of NPM on the transmitted spectrum of optical fiber SPR sensors and the reflected spectrum of prism-based SPR sensors and then obtained optimum permittivity of the NPM, which can excite the sharpest SPR spectrum in the white light region (400–900 nm).