High figure of merit refractive index sensor derived from the axial length ratio of elliptically polarized light of chiral plasmonic structure arrays
High figure of merit refractive index sensor derived from the axial length ratio of elliptically polarized light of chiral plasmonic structure arrays
The refractive index sensor based on the Fano resonance effect (that is, Fano sensor) is one promising branch of plasmonic sensing applications owing to its narrow spectral line shape. Further improvement in the sensitivity and figure of merit (FOM) is the main issue in this field. In contrast to the Fano sensor, herein, we report a novel ultra-sensitive refractive index sensor based on the axial length ratio of transmitted elliptically polarized light of chiral plasmonic structure arrays (that is, ratio sensor). Compared with the optimized Fano sensor in the same asymmetric chiral plasmonic structure arrays, the proposed ratio sensor shows a better sensitivity performance of 556.9 nm/RIU, that is, 1.31 times higher than that of the optimized Fano sensor. Specifically, the quality factor of the spectral line shape and FOM of the proposed ratio sensor reach 121.6 and 60, respectively, that are 2.14 and 2.92 times higher than those of the optimized Fano sensor, respectively. Our study proposes a potential path to achieve high-quality ultra-sensitive refractive index sensing.
Axial length ratio, Chiral plasmonics, Elliptically polarized light, Fano resonance, Refractive index sensor
2365-2373
Zhu, Xupeng
e4198221-2dee-49a8-be47-80f7291d5b9f
Shi, Huimin
3c01b758-ff6b-4218-a7ac-0e1b5770ba4e
Zhang, Shi
923efddd-edb0-49fd-b333-ce5cbd4ddd45
Zheng, Mengjie
f4b413cd-fbeb-40a0-8971-dba68b2e34df
Dai, Peng
1150a00a-e54b-438b-bf51-4e8521c07f66
Huang, Ruomeng
55c6fba5-0275-4471-af5c-fb0dd2daaa64
Liao, Jun
facbc29f-2552-4dad-860c-d1bb4f370a42
Xue, Shuwen
8a98d916-e90c-4d2b-a125-ee0a326a5bc2
December 2023
Zhu, Xupeng
e4198221-2dee-49a8-be47-80f7291d5b9f
Shi, Huimin
3c01b758-ff6b-4218-a7ac-0e1b5770ba4e
Zhang, Shi
923efddd-edb0-49fd-b333-ce5cbd4ddd45
Zheng, Mengjie
f4b413cd-fbeb-40a0-8971-dba68b2e34df
Dai, Peng
1150a00a-e54b-438b-bf51-4e8521c07f66
Huang, Ruomeng
55c6fba5-0275-4471-af5c-fb0dd2daaa64
Liao, Jun
facbc29f-2552-4dad-860c-d1bb4f370a42
Xue, Shuwen
8a98d916-e90c-4d2b-a125-ee0a326a5bc2
Zhu, Xupeng, Shi, Huimin, Zhang, Shi, Zheng, Mengjie, Dai, Peng, Huang, Ruomeng, Liao, Jun and Xue, Shuwen
(2023)
High figure of merit refractive index sensor derived from the axial length ratio of elliptically polarized light of chiral plasmonic structure arrays.
Plasmonics, 18 (6), .
(doi:10.1007/s11468-023-01947-1).
Abstract
The refractive index sensor based on the Fano resonance effect (that is, Fano sensor) is one promising branch of plasmonic sensing applications owing to its narrow spectral line shape. Further improvement in the sensitivity and figure of merit (FOM) is the main issue in this field. In contrast to the Fano sensor, herein, we report a novel ultra-sensitive refractive index sensor based on the axial length ratio of transmitted elliptically polarized light of chiral plasmonic structure arrays (that is, ratio sensor). Compared with the optimized Fano sensor in the same asymmetric chiral plasmonic structure arrays, the proposed ratio sensor shows a better sensitivity performance of 556.9 nm/RIU, that is, 1.31 times higher than that of the optimized Fano sensor. Specifically, the quality factor of the spectral line shape and FOM of the proposed ratio sensor reach 121.6 and 60, respectively, that are 2.14 and 2.92 times higher than those of the optimized Fano sensor, respectively. Our study proposes a potential path to achieve high-quality ultra-sensitive refractive index sensing.
Text
High figure of merit refractive index sensor Derived From the Axial Length Ratio of Elliptically Polarized Light of Chiral Plasmonic Structure Arrays
- Accepted Manuscript
Available under License Other.
More information
Accepted/In Press date: 6 July 2023
e-pub ahead of print date: 21 July 2023
Published date: December 2023
Additional Information:
Funding Information:
We gratefully acknowledge financial support from the National Natural Science Foundation of China (Grant Nos. 12004150, 12104182), the Guangdong Basic and Applied Basic Research Foundation (Grant Nos. 2020A1515110998, 2022A1515012123, 2022A1515110559, and 2020A1515110971), the Education and Scientific Creation Project of Gansu Province (No. 2022B-93), and the Natural Science Foundation of Gansu (No. 22JR5RA154).
Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Keywords:
Axial length ratio, Chiral plasmonics, Elliptically polarized light, Fano resonance, Refractive index sensor
Identifiers
Local EPrints ID: 482139
URI: http://eprints.soton.ac.uk/id/eprint/482139
ISSN: 1557-1955
PURE UUID: 25a32410-8076-430b-a914-0ce8a9e28577
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Date deposited: 20 Sep 2023 16:31
Last modified: 12 Jul 2024 04:08
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Contributors
Author:
Xupeng Zhu
Author:
Huimin Shi
Author:
Shi Zhang
Author:
Mengjie Zheng
Author:
Peng Dai
Author:
Ruomeng Huang
Author:
Jun Liao
Author:
Shuwen Xue
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