Abstract
In this paper, we proposed that local field intensity can be further enhanced by using the light beam carrying the angular momentum to excite the surface plasmon polariton (SPP). The physical process of interaction between the beam carrying the different angular momentum and metal triangles nano-ring(MTNR) and the local SPP enhancement effect are discussed in detail. When the angular momentum of light beam match well with MTNR structure, local electric field will be further enhanced, which provide an effective way to enhanced the localized surface plasmon polaritons (LSPPs). We finally fabricated the MTNR by using microspheres self-assembly and vacuum depositing method and give a proposal experiment to verify the further enhancement of LSPP based on exciting light beam carrying angular momentums.
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