Journal
APPLIED OPTICS
Volume 61, Issue 19, Pages 5552-5558Publisher
Optica Publishing Group
DOI: 10.1364/AO.459864
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [61875026]
- Chongqing Talents Program [CSTC2021YCJHBGZXM0128, CSTC2021YCJH-BGZXM0287]
- Chongqing Graduate Innovation Project [CYS21450]
Ask authors/readers for more resources
This study simulated the cladding mode characteristics of an excessively tilted fiber grating coated with gold nanoshells. It was found that the localized surface plasmon resonance effect can enhance the refractive index sensitivity of the fiber grating.
The cladding mode characteristics simulation of an excessively tilted fiber grating (ExTFG) coated with gold nanoshells was conducted in this study. First, the effective refractive indices of the core and cladding mode before coating were obtained by solving the eigenvalue equation of the three-layer waveguide structure, and the coupling characteristics were briefly analyzed. Then HE(1,)m and EH1, m modes were selected as the research objects, and the spectral characteristics of ExTFG coated with gold nanoshells were simulated by the finite element method. The simulated refractive index sensitivity of HE1,29 and EH1,29 modes is 160.16 and 185.03 nm/RIU, respectively. Compared with the non-localized surface plasmon resonance (LSPR) effect, it increased by 10.76 nm/RIU (7.2%) and 19.53 nm/RIU (11.8%), respectively. Thus, the LSPR effect was verified to be beneficial to improve the refractive index sensitivity of ExTFG. (C) 2022 Optica Publishing Group
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available