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Optical absorber based on self-similar cylindrical element for detecting optical material

机译：基于自相似圆柱元件的光学吸收体用于检测光学材料

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摘要

In this paper, an optical absorber based is exploited on self-similar cylindrical for material detection in the infrared spectrum as a refractive index sensor. Two models are suggested and the effect of the gaps is discussed. Actually, the gaps can be used for intensifying the absorption and improving the figure of merit (FOM). The absorber is modified for 300 THz (1000 nm) with reflection value of -45 dB (0.004) which is made this absorber as a good choice for optical refractive sensing. This study shows the importance of the parasitic elements and gaps for improving the sensing quality and FOM value. In fact, the reflection of the Nanoabsorber is increased extremely without using the parasitic element up to -14 dB. As shown in this paper, the FOM of the prototype absorber is enhanced more than 10 times for some refractive indexes by implementing of gaps. The maximum value of the FOM is 400 PJU"1 for the final model with gap and the maximum sensitivity is 204 nm/RIU obtained for the structure without the gap. In brief, these gaps can be considered for increasing the FOM more than the basic model.
机译：在本文中，基于自相似圆柱的光吸收器被用作折射率传感器，用于红外光谱中的材料检测。提出了两种模型并讨论了间隙的影响。实际上，这些间隙可用于增强吸收并改善品质因数（FOM）。将该吸收器修改为300 THz（1000 nm），反射值为-45 dB（0.004），这使其成为光学折射传感的理想选择。这项研究表明了寄生元素和间隙对提高传感质量和FOM值的重要性。实际上，在不使用高达-14 dB的寄生元件的情况下，纳米吸收体的反射会大大增加。如本文所示，通过实现间隙，对于某些折射率，原型吸收体的FOM增强了10倍以上。对于具有间隙的最终模型，FOM的最大值为400 PJU“ 1，对于没有间隙的结构，其最大灵敏度为204 nm / RIU。简而言之，可以考虑将这些间隙用于增加FOM而不是基本间隙。模型。

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