Concentric tubes silicon-based metamaterial structure for mid-IR broadband absorption
Concentric tubes silicon-based metamaterial structure for mid-IR broadband absorption
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DOI：
10.1364/oe.441105
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发表时间：
2021-12-06
期刊：
影响因子：
3.8
通讯作者：
Swillam, Mohamed A.
中科院分区：
文献类型：
--
作者：
Abouelatta, Mahmoud A. A.;Othman, Muhammad A.;Swillam, Mohamed A.
在这项工作中，我们提出了一个硅（Si）基同心管宽带吸收器。所提出的宽带吸收体由连续的本征Si和掺杂Si（D-Si）层的同心管组成。该结构在从3 μ m延伸到7 μ m的宽范围的中红外波长光谱内表现出宽带性能，在S偏振入射光的情况下，吸收峰在0.88和0.97之间变化。我们报告说，光耦合到拟议的同心管超材料吸收器结构在一个广泛的波长范围内是在不同的波长表现出多种共振机制的结果。我们进一步表明，体等离子激元激发层内导致这种明显的吸收。我们展示了CMOS兼容的超材料吸收体，它对偏振和角度的依赖性较小。此外，所提出的设计揭示了实现用于中红外光检测和中红外热收集应用的硅基宽带吸收的新途径。(C)根据OSA开放获取出版协议的条款，2021年美国光学学会
In this work, we are proposing a silicon (Si) based concentric tube broadband absorber. The proposed broadband absorber is composed of consecutive concentric tubes of intrinsic Si and doped-Si (D-Si) layers. The structure exhibits a broadband performance within a wide range of mid-IR wavelength spectrum extending from 3 to 7 mu m with an absorption peak that varies between 0.88 and 0.97 in the case of S-polarized incident light. We report that light coupling to the proposed concentric tube metamaterial absorber structure over a broad wavelength range is a result of exhibiting multiple resonance mechanisms at different wavelengths. We further show that bulk plasmon polaritons are excited within the layers leading to this noticeable absorption. We demonstrate CMOS compatible metamaterial absorber that is less dependent on polarization and angle. Furthermore, this proposed design reveals new avenues to realize silicon-based broadband absorption for mid-IR photo detection and mid-IR thermal harvesting applications. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement