Abstract
In this paper, the nonlinear effect of second harmonic generation (SHG) in insulator-metal-insulator plasmonic waveguides was investigated. Initially, an IMI plasmonic waveguide was simulated and its SHG effect was considered, then an IMI grating structure was proposed to increase the SHG effect and reduce its loss. Finally, it is realized that the proposed structure can enhance the SHG effect and the frequency spectra compared to the fundamental structure.
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