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具有精细传感性能的基于石墨烯的太赫兹五频段超材料吸收器的设计

Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance.

作者信息

Lai Runing, Chen Hao, Zhou Zigang, Yi Zao, Tang Bin, Chen Jing, Yi Yougen, Tang Chaojun, Zhang Jianguo, Sun Tangyou

机构信息

Joint Laboratory for Extreme Conditions Matter Properties, Tianfu Institute of Research and Innovation, State Key Laboratory of Environmental Friendly Energy Materials, Key Laboratory of Manufacturing Process Testing Technology of Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China.

School of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China.

出版信息

Micromachines (Basel). 2023 Sep 21;14(9):1802. doi: 10.3390/mi14091802.

DOI:10.3390/mi14091802
PMID:37763965
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10536418/
Abstract

This paper presents a new theoretical proposal for a surface plasmon resonance (SPR) terahertz metamaterial absorber with five narrow absorption peaks. The overall structure comprises a sandwich stack consisting of a gold bottom layer, a silica medium, and a single-layer patterned graphene array on top. COMSOL simulation represents that the five absorption peaks under TE polarization are at = 1.99 THz (95.82%), = 6.00 THz (98.47%), = 7.37 THz (98.72%), = 8.47 THz (99.87%), and = 9.38 THz (97.20%), respectively, which is almost consistent with the absorption performance under TM polarization. In contrast to noble metal absorbers, its absorption rates and resonance frequencies can be dynamically regulated by controlling the Fermi level and relaxation time of graphene. In addition, the device can maintain high absorptivity at 050° in TE polarization and 040° in TM polarization. The maximum refractive index sensitivity can reach = 1.75 THz/RIU, and the maximum figure of merit (FOM) can reach FOM = 12.774 RIU. In conclusion, our design has the properties of dynamic tunability, polarization independence, wide-incident-angle absorption, and fine refractive index sensitivity. We believe that the device has potential applications in photodetectors, active optoelectronic devices, sensors, and other related fields.

摘要

本文提出了一种具有五个窄吸收峰的表面等离子体共振（SPR）太赫兹超材料吸收器的新理论方案。整体结构由一个三明治堆叠组成，包括底部的金层、二氧化硅介质层以及顶部的单层图案化石墨烯阵列。COMSOL模拟表明，TE偏振下的五个吸收峰分别位于 = 1.99太赫兹（95.82%）、 = 6.00太赫兹（98.47%）、 = 7.37太赫兹（98.72%）、 = 8.47太赫兹（99.87%）和 = 9.38太赫兹（97.20%），这与TM偏振下的吸收性能几乎一致。与贵金属吸收器相比，其吸收率和共振频率可通过控制石墨烯的费米能级和弛豫时间进行动态调节。此外，该器件在TE偏振下050°以及TM偏振下040°范围内可保持高吸收率。最大折射率灵敏度可达 = 1.75太赫兹/RIU，最大品质因数（FOM）可达FOM = 12.774 RIU。总之，我们的设计具有动态可调性、偏振无关性、宽入射角吸收以及良好的折射率灵敏度等特性。我们相信该器件在光电探测器、有源光电器件、传感器及其他相关领域具有潜在应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/daf9ec47fbd3/micromachines-14-01802-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/dd35de2f3555/micromachines-14-01802-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/3d5191c29827/micromachines-14-01802-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/d96272cfecd9/micromachines-14-01802-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/6b8b662aab7c/micromachines-14-01802-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/5d23278002eb/micromachines-14-01802-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/25c035386474/micromachines-14-01802-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/c1f7c6885715/micromachines-14-01802-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/665416190013/micromachines-14-01802-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/157ee3b6eae0/micromachines-14-01802-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/a2cc81b8fc83/micromachines-14-01802-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/a89711d7b666/micromachines-14-01802-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/93d42f16aa11/micromachines-14-01802-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/a9e69ba2a514/micromachines-14-01802-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/daf9ec47fbd3/micromachines-14-01802-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/dd35de2f3555/micromachines-14-01802-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/3d5191c29827/micromachines-14-01802-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/d96272cfecd9/micromachines-14-01802-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/6b8b662aab7c/micromachines-14-01802-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/5d23278002eb/micromachines-14-01802-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/25c035386474/micromachines-14-01802-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/c1f7c6885715/micromachines-14-01802-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/665416190013/micromachines-14-01802-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/157ee3b6eae0/micromachines-14-01802-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/a2cc81b8fc83/micromachines-14-01802-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/a89711d7b666/micromachines-14-01802-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/93d42f16aa11/micromachines-14-01802-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/a9e69ba2a514/micromachines-14-01802-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8831/10536418/daf9ec47fbd3/micromachines-14-01802-g014.jpg

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