期刊
APPLIED OPTICS
卷 61, 期 22, 页码 6664-6670出版社
Optica Publishing Group
DOI: 10.1364/AO.463868
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资金
- Outstanding Youth Science Fund of Xi'an University of Science and Technology [2019YQ3-10]
- National Key Research and Development Program of China Stem Cell and Translational Research [2021YFE0105000]
- NationalNatural Science Foundation of China [11604260, 52104218]
A terahertz surface plasmon resonance (SPR) sensor is designed based on photonic crystal fiber (PCF) with selectively coated graphene as the plasmonic material. The SPR frequency can be dynamically tuned by adjusting the chemical potential of graphene, and it shows sensitivity to changes in the refractive index of analyte.
A terahertz surface plasmon resonance (SPR) sensor is designed based on photonic crystal fiber (PCF). Graphene is selectively coated in the cladding hole of the PCF and used as plasmonic material. The coupling mechanism, loss properties, tunability, and refractive index sensing performance of the designed SPR sensor are investigated using the finite element method. The peak of the loss spectrum corresponding to the SPR frequency can be dynamically tuned by adjusting graphene's chemical potential, and a tuning sensitivity of 767.5 GHz/eV is obtained. The SPR frequency red shifts linearly with an increase in the refractive index of analyte from 1.0 to 1.5. An average frequency sensitivity of 208.14 GHz/RIU is obtained. This research provides theoretical guidance for the design of terahertz in-fiber SPR sensors and filters. (C) 2022 Optica Publishing Group
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