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Film-coupled log-periodic optical antennas for near-infrared light absorption

机译：薄膜耦合对数周期光天线，用于吸收近红外光

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摘要

Absorption properties of film-coupled log-periodic optical antennas in the near-infrared region are numerically investigated. The maximum absorption for TE and TM polarizations at normal incidence reach to 95% and 93%, respectively, and the optimal absorption of around 90% can be simultaneously obtained for both cases. It is shown that the main absorption peak is independent to light polarizations at normal incidence. Moreover, the log-periodic antenna-assisted absorption represents district polarization selectivity at high-order resonances. For oblique incidence, only the incident light of specific wavelengths within a narrow incidence angle can be almost entirely trapped inside the absorber, indicating special direction and wavelength selectivity of the absorber. All these features would lead to potential applications in photovoltaic technology, sensing, etc.
机译：数值研究了膜耦合对数周期光天线在近红外区域的吸收特性。在垂直入射时，TE和TM极化的最大吸收分别达到95％和93％，两种情况下可以同时获得大约90％的最佳吸收。结果表明，主吸收峰在垂直入射时与光偏振无关。此外，对数周期的天线辅助吸收代表高阶共振下的区域极化选择性。对于倾斜入射，只有窄入射角内特定波长的入射光几乎可以全部捕获在吸收体内部，这表明吸收体的特殊方向和波长选择性。所有这些功能将导致在光伏技术，传感等领域的潜在应用。

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  • 来源
    《Plasmonics》|2014年|92781B.1-92781B.7|共7页
  • 会议地点 Beijing(CN)
  • 作者

    Yuzhou Tian; Ding Zhao; Qiang Li; Min Qiu;

  • 作者单位

    State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 310027, China;

    State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 310027, China;

    State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 310027, China;

    State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 310027, China,School of Information and Communication Technology, Royal Institute of Technology (KTH), Electrum 229, 164 40 Kista, Sweden;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Plasmonics; Optical absorber; Log-periodic nanoantennas;

    机译：等离子光学吸收体；对数周期纳米天线;

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