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论文类型： 期刊论文

发表时间： 2020-02-01

发表刊物： NANOMATERIALS

收录刊物： PubMed、SCIE

卷号： 10

期号： 2

关键字： double-layer plasmonic grooves; multi-resonance sensing; surface plasmon polaritons

摘要： A high-performance multi-resonance plasmonic sensor with double-layer metallic grooves is theoretically constructed by introducing a polymethyl methacrylate groove with a numerical simulation method. Multiple resonance wavelengths can be generated at the oblique incidence, and the number and feature of resonant mode for sensing detection is different for various incident angles. Specifically, at the incident angle of 30 degrees, the reflection spectrum exhibits two resonant dips, in which the dip at the wavelength of 1066 nm has an extremely narrow line width of similar to 4.5 nm and high figure of merit of similar to 111.11. As the incident angle increases, the electric dipole mode gradually weakens, but the surface plasmon resonance and cavity resonance mode are enhanced. Therefore, for an incident angle of 65 degrees, three resonance dips for sensing can be generated in the reflection spectrum to realize three-channel sensing measurement. These double-layer plasmonic grooves have potential in the development of advanced biochemical surface plasmon polariton measurements.