Design of Planar Reconfigurable, Tunable, and Wide Angle Resonant Absorbers for Applications in the IR Spectrum,Advanced Theory and Simulations

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Design of Planar Reconfigurable, Tunable, and Wide Angle Resonant Absorbers for Applications in the IR Spectrum
Advanced Theory and Simulations ( IF 2.9 ) Pub Date : 2021-04-21 , DOI: 10.1002/adts.202100002
Igor Leonardo Gomes de Souza ₁ , Vitaly Felix Rodriguez‐Esquerre ₂ , Israel Alves Oliveira ₃

Affiliation

A hybrid resonant absorber Fabry Perot—FP tunable from a simple stack of planar layers of ultra-thin films of phase change material is proposed, designed, and demonstrated numerically. This work shows that properly designed metal–dielectric–metal) structures comprising thin films of titanium (Ti), germanium telluride (GeTe) on a silver (Ag) substrate produce a dynamic modulation of light in the near IR with almost perfect absorption (A > 93%). It is demonstrated that the resonant peaks of the hybrid absorber can be tuned in two different ways for any wavelength, with the crystallization fractions and the thickness of the dielectric. The influence of the metallic top layer thickness is also analyzed and demonstrated the fabrication error tolerance of the proposed absorber is demonstrated. Also analyzed is the influence of the thickness of the metallic top layer and tolerance to fabrication error of the proposed absorber is demonstrated. Finally, the physical mechanisms for the coupling of the electromagnetic field and the absorbed optical power in the structure proposed are presented and discussed. This study allows the beginning of the development of hybrid devices to control the absorption of light in the region of the electromagnetic spectrum used in optical communications.

中文翻译：

用于红外光谱应用的平面可重构、可调谐和广角谐振吸收器的设计

提出、设计和数值演示了一种混合谐振吸收器法布里珀罗 - FP 可从相变材料的超薄膜平面层的简单堆叠进行调谐。这项工作表明，由银 (Ag) 衬底上的钛 (Ti)、碲化锗 (GeTe) 薄膜组成的适当设计的金属 - 介电 - 金属结构在近红外光中产生动态调制，具有几乎完美的吸收（A> 93%）。结果表明，混合吸收体的共振峰可以以两种不同的方式针对任何波长进行调谐，即结晶分数和电介质的厚度。还分析了金属顶层厚度的影响，并证明了所提出的吸收器的制造误差容限。还分析了金属顶层厚度的影响，并证明了所提出的吸收器的制造误差容限。最后，提出并讨论了电磁场耦合的物理机制和所提出的结构中吸收的光功率。这项研究开始了混合设备的开发，以控制光通信中使用的电磁光谱区域中的光吸收。

更新日期：2021-06-05

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