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<p>Thanks to nonlinear effects, focusing, filtering, waveguide coupling, field enhancement, and other high degrees of optical tunability, resonant waveguide grating (RWG) has a broad scope of applications in science and industry, such as in solar cells, photodetectors, polarizers, spectrometers, filters, and biosensors. For field enhancement ability on the surface of RWGs for bioimaging and biosensing applications, a diverse range of parameters affect the electronic field distribution on the surface of RWGs, such as depth and period of grating, materials used to fabricate the grating, thickness, and refractive index of the layers around the grating. This research focuses on investigating the refractive index dependence of the resonance angle and the average value of the magnitude square of the electric field on the surface of the grating based on a simulation method. After optimizing the refractive index, an experiment was conducted to synthesize RWG and the real system, utilizing a grating to measure transmission and achieve good transmittance results.</p>

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Influence of refractive index of liquid above resonance waveguide grating on resonance angle and electric field distribution along surface of grating

  • 期刊论文

  • 发表日期：

    2025年12月9日

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  • Van Nghia Nguyen

摘要

Thanks to nonlinear effects, focusing, filtering, waveguide coupling, field enhancement, and other high degrees of optical tunability, resonant waveguide grating (RWG) has a broad scope of applications in science and industry, such as in solar cells, photodetectors, polarizers, spectrometers, filters, and biosensors. For field enhancement ability on the surface of RWGs for bioimaging and biosensing applications, a diverse range of parameters affect the electronic field distribution on the surface of RWGs, such as depth and period of grating, materials used to fabricate the grating, thickness, and refractive index of the layers around the grating. This research focuses on investigating the refractive index dependence of the resonance angle and the average value of the magnitude square of the electric field on the surface of the grating based on a simulation method. After optimizing the refractive index, an experiment was conducted to synthesize RWG and the real system, utilizing a grating to measure transmission and achieve good transmittance results.