Highly sensitive self-referential plasmonic sensor based on double-layer nested grating

doi:10.1016/j.optcom.2024.130348

IR > 理学院

	Highly sensitive self-referential plasmonic sensor based on double-layer nested grating
	Rao, Xijun 1; Wang, Xiangxian1,3 ; Chen, Yizhen 1; Chen, Hanwen 1; Qi, Yunping 2; Yang, Hua1
	2024-05-01
在线发表时间	2024-02
发表期刊	OPTICS COMMUNICATIONS
ISSN	0030-4018
卷号	558
摘要	To overcome the limitations of existing biochemical detection methods in sensing applications, a highly sensitive sensor that can effectively detect refractive-index changes in both gas and liquid environments is required. Hence, this paper proposes a surface plasmonic sensor based on a double-layer nested grating, which exhibits self-reference characteristics and can be used for refractive-index (RI) sensing in gas and liquid environments within the infrared band. The double-layer nested grating constitutes a gold nano-grating embedded in a silica substrate (lower-layer grating) and a gold nano-grating exposed to the analyte medium environment (upper-layer grating). The lower layer grating is a metal/silica grating while the upper layer grating is a metal/medium grating. The gold nano-grating in the upper and lower layers of the grating are interlaced with each other in the vertical direction. The plasmon phenomenon excited by the sensor is discussed with respect to the finitedifference time-domain (FDTD) method and theoretical analysis. The results reveal that the sensor can efficiently excite two propagating surface plasmon resonance (PSPR) modes, one of which can be used for selfreference and the other for sensing. The sensor exhibits the advantages of being suitability for gas and liquid environments, high sensitivity, a high figure of merit (FOM), and strong detection signals. Furthermore, the sensor exhibits a strong sensing performance with a sensitivity of approximately 1000 nm/RIU and a maximum FOM of 237 RIU-1 in gas and liquid environments. The sensitivities of the self-reference channel in the gas and liquid environments are 17 nm/RIU and 18 nm/RIU, respectively. The proposed sensor demonstrates significant potential for application in the field of biochemical detection.
关键词	Surface plasmon Refractive index sensing Grating Self -reference
DOI	10.1016/j.optcom.2024.130348
收录类别	SCIE ; EI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC) [62365012, 62165013]
WOS研究方向	Optics
WOS类目	Optics
WOS记录号	WOS:001184106300001
出版者	ELSEVIER
EI入藏号	20240715540048
EI主题词	Surface plasmon resonance
EI分类号	547.1 Precious Metals ; 741.1 Light/Optics ; 921 Mathematics ; 932.3 Plasma Physics
原始文献类型	Article
EISSN	1873-0310
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/169832
专题	理学院
通讯作者	Wang, Xiangxian; Chen, Yizhen
作者单位	1.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China; 2.Northwest Normal Univ, Coll Phys & Elect Engn, Lanzhou 730070, Peoples R China; 3.Lanzhou Univ Technol, Sch Sci, Lanzhou, Peoples R China
第一作者单位	理学院
通讯作者单位	理学院
第一作者的第一单位	理学院
推荐引用方式 GB/T 7714	Rao, Xijun,Wang, Xiangxian,Chen, Yizhen,et al. Highly sensitive self-referential plasmonic sensor based on double-layer nested grating[J]. OPTICS COMMUNICATIONS,2024,558.
APA	Rao, Xijun,Wang, Xiangxian,Chen, Yizhen,Chen, Hanwen,Qi, Yunping,&Yang, Hua.(2024).Highly sensitive self-referential plasmonic sensor based on double-layer nested grating.OPTICS COMMUNICATIONS,558.
MLA	Rao, Xijun,et al."Highly sensitive self-referential plasmonic sensor based on double-layer nested grating".OPTICS COMMUNICATIONS 558(2024).