Abstract
Recent developments on the technologies and equipments of surface plasmon-enhanced Raman scattering (SERS) based on the propagating surface plasmons (PSPs) are introduced in this review. It involves three aspects: (1) The principle and the configuration of PSPs-enhanced Raman spectroscopy are stated. The technology of the PSPs-based SERS in the evanescent field, the combination of SERS and SPR sensing, and the long-range SP-enhanced Raman scattering are included. (2) SERS based on the PSPs-LSPs co-enhancement for ultra-sensitive detection is introduced. Under the configuration of the PSPs-excited SERS in the evanescent field, the addition of metal nanoparticles resulted in the resonance of localized surface plasmons (LSPs), which can further enhance the local electric field. Applications of the SPR-SERS spectroscopy for monitoring the recognition system of biomolecules are referred, which indicate that the sensitivities of SERS and SPR are both greatly improved. Besides, SERS on periodical metallic substrates due to the PSPs and LSPs co-excitation is achieved. (3) The directional SERS technology based on PSPs is shown. High SERS exciting and collecting efficiency could be achieved via the directional SERS technology.
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