Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 125, Issue 1, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-018-2283-0
Keywords
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Funding
- National Natural Science Foundation of China [61605177]
- National Science Fund for Distinguished Young Scholars [61525107]
- Fund for Shanxi 1331 Project Key subjects construction [1331KSC]
- Natural Science Research Foundation of Shanxi Province, China [201701D121065]
- Open Project Fund of Science and Technology on Electronic Test and Measurement Laboratory [ZDSYSJ2015003]
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A metal-insulator-metal (MIM) waveguide with tooth cavity-coupled ring splitting cavity is proposed. Transmission characteristics and refractive index sensitivity are investigated by using finite-element method. A Fano-like line is observed in the transmission spectrum, and it is caused by the coherent superposition of the narrow discrete and wide continuous states. A maximum sensitivity of 1200nm/RIU is achieved based on the Fano resonance effect when the air in the MIM waveguide and cavity is replaced by an insulator with a different refractive index. In addition, the derived structures of the plasmonic system are studied, and multiple Fano-like resonances are observed in the transmission spectrum. The effects of the structural parameters of plasmonic system on the Fano resonance are also investigated.
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