基于石墨烯-硅光栅的广角红外等离子体完美吸收体

IF 0.7 4区物理与天体物理 Q4 OPTICS

Optica Applicata Pub Date : 2021-01-01 DOI:10.37190/OA210107

Fang Chen

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引用次数: 0

摘要

本文利用双层石墨烯带光栅与二氧化硅光栅耦合，实现了广角红外完美吸收。时域有限差分方法的数值模拟表明，由于有效的阻抗匹配，可以实现完美的吸收，并且所有入射电磁能量都被限制在银衬底和石墨烯带状光栅之间的Al2O3层中。通过改变双层石墨烯条带光栅的条带宽度或化学势，可以实现双波段完美吸收。发现吸收峰的光谱位置可以通过化学势或石墨烯条的宽度来调节，另外还可以通过所提议的吸收剂的尺寸来调节。此外，所提出的完美吸收体在±65°的入射角范围内具有良好的吸收稳定性。所提出的吸收剂在中红外可调谐双波段完美吸收剂中具有潜在的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Wide-angle infrared plasmonic perfect absorber based on graphene-silica grating

In this paper, wide-angle infrared perfect absorption has been demonstrated by using a double-layer graphene strip grating coupled with a silicon dioxide grating. Numerical simulation of the finite-difference time-domain method indicates that the perfect absorption can be achieved due to the effective impedance matching, and all the incident electromagnetic energy is confined in the Al2O3 layer between the silver substrate and the graphene strip grating. Dual-band perfect absorption is achieved with the change of strip width or chemical potential of the bi-layer graphene strip grating. It is found that the spectral position of the absorption peak can be tuned by the chemical potential or the width of the graphene strip, and additionally by the size of the proposed absorber. Moreover, the proposed perfect absorber shows excellent absorption stability for a wide range of the incident angle up to ±65°. The proposed absorber may find potential application in tunable double band perfect absorbers in the mid-infrared range.

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来源期刊

Optica Applicata 物理-光学

CiteScore

1.00

自引率

16.70%

发文量

审稿时长

4 months

期刊介绍： Acoustooptics, atmospheric and ocean optics, atomic and molecular optics, coherence and statistical optics, biooptics, colorimetry, diffraction and gratings, ellipsometry and polarimetry, fiber optics and optical communication, Fourier optics, holography, integrated optics, lasers and their applications, light detectors, light and electron beams, light sources, liquid crystals, medical optics, metamaterials, microoptics, nonlinear optics, optical and electron microscopy, optical computing, optical design and fabrication, optical imaging, optical instrumentation, optical materials, optical measurements, optical modulation, optical properties of solids and thin films, optical sensing, optical systems and their elements, optical trapping, optometry, photoelasticity, photonic crystals, photonic crystal fibers, photonic devices, physical optics, quantum optics, slow and fast light, spectroscopy, storage and processing of optical information, ultrafast optics.