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Sensing characteristics based on Fano resonance in rectangular ring waveguide

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WOS被引频次:10
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成果类型:
期刊论文
作者:
Chen, Zhiquan;Li, Hongjian*;Zhan, Shiping;He, Zhihui;Li, Boxun;Xu, Hui
通讯作者:
Li, Hongjian
作者机构:
[He, Zhihui; Zhan, Shiping; Chen, Zhiquan; Li, Boxun; Xu, Hui; Li, Hongjian] Cent S Univ, Coll Phys & Elect, Changsha 410083, Hunan, Peoples R China.
[Chen, Zhiquan] Hunan City Univ, Coll Commun & Elect Engn, Yiyang 413000, Peoples R China.
通讯机构:
[Li, Hongjian] Cent S Univ, Coll Phys & Elect, Changsha 410083, Hunan, Peoples R China.
语种:
英文
关键词:
Surface Plasmon Polaritons;Fano resonance;Sensor;Sensitivity;Figure of merit
期刊:
Optics Communications
ISSN:
0030-4018
年:
2015
卷:
356
页码:
373-377
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:物理学;WOS学科类别:Optics
入藏号:
WOS:000362603600059;EI:20153501207647
基金类别:
Fundamental Research Funds for the Central Universities of Central South University [72150050429]; National Natural Science Foundation of China [61275174]
机构署名:
本校为其他机构
院系归属:
信息与电子工程学院
摘要:
Sensing characteristics based on Fano resonance in a rectangular ring resonator with a stub are investigated numerically. Simulation results show that a sharp and asymmetric Fano-line shape emerges in the proposed structure. Through tuning the width and length of the stub, it is found that the width and length play an important role in optimizing the sensing characteristic. Using the sharp and asymmetric Fano-line shape a highly sensitive plasmonic nanosensor with the sensitivity of 1000 nm/RIU and a tunable figure of merit (FOM) can be attained. The maximum FOM can reach up to 992,800 when the stub length d=120 nm, width l=130 nm and the refractive index difference Δn=0.05, which is larger than that in previous reports. In addition, the results show that a larger FOM can be obtained by tuning the stub width than tuning its length. The proposed model and results provide guidance for fundamental research of the plasmonic nanosensor applications and designs. ©2015 Elsevier B.V. All rights reserved.
参考文献:
Atwater HA, 2010, NAT MATER, V9, P205, DOI [10.1038/NMAT2629, 10.1038/nmat2629]
Becker J, 2010, PLASMONICS, V5, P161, DOI 10.1007/s11468-010-9130-2
Cao GT, 2014, OPT EXPRESS, V22, P25215, DOI 10.1364/OE.22.025215
Cao GT, 2014, PLASMONICS, V9, P1163, DOI 10.1007/s11468-014-9727-y
Cao GT, 2013, OPT EXPRESS, V21, P9198, DOI 10.1364/OE.21.009198

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