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Investigation of geometrical effects of antireflective subwavelength grating structures for optical device applications

机译：用于光学器件的抗反射亚波长光栅结构的几何效应研究

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摘要

We calculated diffraction efficiencies of subwavelength grating (SWG) structures for various optical device applications by using a rigorous coupled-wave analysis method. The geometrical effects, such as grating shape, height, and period, were investigated in order to obtain better antireflection performance. Cone shaped SWG structures with a taller height provide lower reflectance over a broadband wavelength range compared to that of flat surface and nanorod. It was found that the low reflection regions are quite related with the grating period and the refractive index of substrate materials. From the comparison between external and internal reflection of SWG structures, we also showed that the internal reflection requires shorter grating period than the case of external reflection to acquire broadband antireflection properties.
机译：通过使用严格的耦合波分析方法，我们为各种光学设备应用计算了亚波长光栅（SWG）结构的衍射效率。为了获得更好的抗反射性能，研究了几何效应，例如光栅的形状，高度和周期。与平坦表面和纳米棒相比，具有较高高度的圆锥形SWG结构在宽带波长范围内提供较低的反射率。发现低反射区域与光栅周期和衬底材料的折射率非常相关。通过比较SWG结构的内部和内部反射，我们还发现内部反射需要比外部反射更短的光栅周期来获得宽带减反射特性。

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  • 来源
    《Optical and quantum electronics》 |2009年第10期|P.771-777|共7页
  • 作者

    Young Min Song; Yong Tak Lee;

  • 作者单位

    Department of Information and Communications, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju, 500-712 Korea;

    rnDepartment of Information and Communications, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju, 500-712 Korea Department of Nanobio Materials and Electronics, Graduate Program of Photonics and Applied Physics, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju, 500-712 Korea;

  • 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

    subwavelength grating; antireflection; optical device; effective medium theory; nanostructure;

    机译：亚波长光栅防反射光学设备有效媒介理论纳米结构;

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