On the electric field enhancement and performance of SPR gas sensor based on graphene for visible and near infrared
On the electric field enhancement and performance of SPR gas sensor based on graphene for visible and near infrared
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DOI：
10.1016/j.snb.2014.10.006
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发表时间：
2015-02-01
影响因子：
8.4
通讯作者：
Padhy, Punnag
中科院分区：
文献类型：
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作者：
Maharana, Pradeep Kumar;Jha, Rajan;Padhy, Punnag
提出了一种基于石墨烯/银的高性能表面等离子体共振（SPR）亲和气体传感器。所提出的传感器配置已被优化为在感测层界面处的最大表面等离子体场。在λ = 653 nm、λ = 850 nm和λ = 1000 nm处，敏感层界面处的场强增强因子高于Ag上硅的场强增强因子，从而使成像灵敏度分别提高340%、120%和82%，检测精度分别提高440%、150%和100%。在λ = 653 nm和λ = 1000 nm处，传感器的分辨率分别为8 × 10（-5）RIU和2 × 10（-5）RIU。我们相信，所提出的基于SPR的气体传感器配置将通过利用石墨烯和最新的纳米纤维技术的优势，为高效的气体传感开辟一条新的途径。(C)2014爱思唯尔有限公司版权所有。
We propose a high performance surface plasmon resonance (SPR) affinity gas sensor based on graphene on Ag in visible and near infrared. Proposed sensor configuration has been optimized for maximum surface plasmon field at the sensing layer interface. The field intensity enhancement factor at sensing layer interface is found to be higher than that of silicon over layer on Ag thereby increasing the imaging sensitivity by 340%, 120% and 82% and detection accuracy by 440%, 150% and 100% as compared to Si on Ag configuration at lambda = 653 nm, lambda = 850 nm and lambda = 1000 nm respectively. The performance of the sensor is found to be high over a broad refractive index range (1.0000-1.0008) of gaseous analyte with sensor resolution of 8 x 10(-5) RIU and 2 x 10(-5) RIU at lambda = 653 nm and lambda = 1000 nm respectively. We believe the proposed SPR based gas sensor configuration will open a new route for efficient gas sensing by riding on the advantage of graphene and latest nanofabrication techniques. (C) 2014 Elsevier B.V. All rights reserved.