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首页> 外文期刊>Optical engineering >Finite-difference time-domain analysis of hydrogenated amorphous silicon and aluminum surface plasmon waveguides
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Finite-difference time-domain analysis of hydrogenated amorphous silicon and aluminum surface plasmon waveguides

机译：氢化非晶硅和铝表面等离子体激元波导的时域有限差分分析

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摘要

The large majority of surface plasmon resonance (SPR)-based devices use noble metals, namely gold or silver, in their manufacturing process. These metals present low resistivity, which leads to low optical losses in the visible and near-infrared spectrum ranges. Gold shows high environmental stability, which is essential for long-term operation, and the lower stability of silver can be overcome through the deposition of an alumina layer, for instance. However, their high cost is a limiting factor if the intended target is large-scale manufacturing. This work considers a cost-effective approach through the selection of aluminum as the plasmonic material and hydrogenated amorphous silicon instead of its crystalline counterpart. This SPR structure relies on Fano resonance to improve its response to refractive index deviations of the surrounding environment. Fano resonance is highly sensitive to slight changes of the medium, hence the reason we incorporated this interference phenomenon in the proposed sensing structure. We report the results obtained when conducting finite-difference time-domain algorithm-based simulations on this metal-dielectric-metal structure when the active metal is aluminum, gold, and silver. Then, we evaluate their sensitivity, detection accuracy, and resolution. The obtained results for our proposed sensing structure show good linearity and similar parameter performance as the ones obtained when using gold or silver as plasmonic materials.
机译：基于表面等离子体激元共振（SPR）的大多数设备在其制造过程中都使用贵金属，即金或银。这些金属的电阻率低，从而导致可见光和近红外光谱范围内的光损耗低。金显示出高环境稳定性，这对于长期运行至关重要，而银的较低稳定性可以通过例如氧化铝层的沉积来克服。但是，如果预期的目标是大规模制造，则其高成本是限制因素。这项工作认为，通过选择铝作为等离子体材料和氢化非晶硅而不是其晶体对应物，是一种经济有效的方法。此SPR结构依靠Fano共振来改善其对周围环境的折射率偏差的响应。磁场共振对介质的细微变化高度敏感，因此我们将这种干扰现象纳入拟议的传感结构中的原因。当活性金属为铝，金和银时，我们报告了在这种介电金属结构上进行基于时域有限差分算法的模拟时获得的结果。然后，我们评估它们的灵敏度，检测精度和分辨率。我们提出的传感结构的结果与使用金或银作为等离子体材料时所获得的结果具有良好的线性关系和相似的参数性能。

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  • 来源
    《Optical engineering》 |2018年第7期|077103.1-077103.6|共6页
  • 作者

    Paulo Lourenco; Alessandro Fantoni; Miguel Fernandes; Yuri Vygranenko; Manuela Vieira;

  • 作者单位

    Universidade Nova de Lisboa, Faculdade de Ciencias e Tecnologia, Departamento de Engenharia Eletrotecnica, Campus da Caparica, Caparica, Portugal,Universidade Nova de Lisboa, CTS-UNINOVA, Faculdade de Ciencias e Tecnologia, Departamento de Engenharia Eletrotecnica, Campus da Caparica, Caparica, Portugal;

    Universidade Nova de Lisboa, Faculdade de Ciencias e Tecnologia, Departamento de Engenharia Eletrotecnica, Campus da Caparica, Caparica, Portugal,Universidade Nova de Lisboa, CTS-UNINOVA, Faculdade de Ciencias e Tecnologia, Departamento de Engenharia Eletrotecnica, Campus da Caparica, Caparica, Portugal,Institute Superior de Engenharia de Lisboa, Instituto Politecnico de Lisboa, Lisboa, Portugal;

    Universidade Nova de Lisboa, CTS-UNINOVA, Faculdade de Ciencias e Tecnologia, Departamento de Engenharia Eletrotecnica, Campus da Caparica, Caparica, Portugal,Institute Superior de Engenharia de Lisboa, Instituto Politecnico de Lisboa, Lisboa, Portugal;

    Universidade Nova de Lisboa, CTS-UNINOVA, Faculdade de Ciencias e Tecnologia, Departamento de Engenharia Eletrotecnica, Campus da Caparica, Caparica, Portugal,Institute Superior de Engenharia de Lisboa, Instituto Politecnico de Lisboa, Lisboa, Portugal;

    Universidade Nova de Lisboa, Faculdade de Ciencias e Tecnologia, Departamento de Engenharia Eletrotecnica, Campus da Caparica, Caparica, Portugal,Universidade Nova de Lisboa, CTS-UNINOVA, Faculdade de Ciencias e Tecnologia, Departamento de Engenharia Eletrotecnica, Campus da Caparica, Caparica, Portugal,Institute Superior de Engenharia de Lisboa, Instituto Politecnico de Lisboa, Lisboa, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    photonics; finite-difference time-domain simulations; surface plasmon resonance; Fano interference;

    机译：光子学时域有限差分仿真;表面等离子体共振;法诺干扰;

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