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首页> 美国卫生研究院文献>Materials >Extending Absorption Edge through the Hybrid Resonator-Based Absorber with Wideband and Near-Perfect Absorption in Visible Region
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Extending Absorption Edge through the Hybrid Resonator-Based Absorber with Wideband and Near-Perfect Absorption in Visible Region

机译：通过可见光区域内宽带和近乎完美吸收的混合谐振器吸收器扩展吸收边缘

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Metamaterial absorber with the unexpected capability for harvesting electromagnetic energy has been regarded as a potential route for various applications, including chemical/biological sensing, cloaking and photovoltaic applications. In this study, we presented the simple absorber design made with Al/SiO /Al sandwich structures through the involvement of hybrid dual-resonators that could allow the wideband light absorption covered from 450 nm to 600 nm with average absorptivity above 95%. Examinations of excited electric field, magnetic field and total magnitude of electric field in three-dimensional space at resonances were performed to clarify the origin of resonant behaviors. In addition, an equivalent inductance–capacitance circuit model was proposed that could qualitatively explore the geometry-dependent absorption characteristics by modulating the constitutive parameters of hybrid resonators. As a result, the designed light absorber might enable to be practically applied for various optical-management and photovoltaic applications, and even offered the tunability for other desired frequency regions.
机译：具有出乎意料的电磁能量收集能力的超材料吸收器已被视为各种应用的潜在途径，包括化学/生物传感，隐身和光伏应用。在这项研究中，我们介绍了通过混合双谐振器参与的由Al / SiO / Al夹心结构制成的简单吸收器设计，该谐振器可使宽带光吸收范围从450 nm到600 nm，平均吸收率超过95％。在共振时对三维空间中的激发电场，磁场和电场总强度进行了检查，以阐明共振行为的起源。另外，提出了一个等效的电感电容电路模型，该模型可以通过调制混合谐振器的本构参数来定性地探索与几何相关的吸收特性。结果，设计的光吸收器可能能够实际应用于各种光学管理和光伏应用，甚至为其他所需的频率区域提供可调性。

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