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http://dx.doi.org/10.1016/j.snb.2004.08.033

has been cited by the following article:

• TITLE: Detecting High-Refractive-Index Media Using Surface Plasmon Sensor with One-Dimensional Metal Diffraction Grating

  AUTHORS: Atsushi Motogaito, Shinya Mito, Hideto Miyake, Kazumasa Hiramatsu

  KEYWORDS: Surface Plasmon Resonance, High-Refractive-Index Media, Diffraction Grating, Extraordinary Transmission

  JOURNAL NAME: Optics and Photonics Journal, Vol.6 No.7, July 18, 2016

  ABSTRACT: We experimentally detect high-refractive-index media (n > 1.5) using a surface plasmon resonance (SPR) sensor with a diffraction grating. While SPR sensors are generally based on the attenuated total reflection method using metal films, here, we focus on a method using a diffraction grating, which can detect relatively higher refractive-index media and is suitable for device miniaturization. In this study, we used the rigorous coupled-wave analysis method to simulate the dependence of the reflectance on an incident angle for media with refractive index values up to 1.700. In the experiment, a medium (n = 1.660 - 1.700) was successfully detected using this grating. Under the conditions of the grating (period: 600 nm, Au thickness: 40 nm) using a red laser (λ: 635 nm), a sharp decline in the reflectance and a rise in the transmittance at certain angles were confirmed, demonstrating the extraordinary transmission enabled by SPR. Because excitation angles changed with changes in the refractive index, we concluded that this method can be applied to sensors that detect high-refractive-index media.