Development and Application of Surface Plasmon Polaritons on Optical Amplification
(a) Device configuration: a PMMA strip confines the plasmon at the gold/polymer interface. An additional tapering structure is designed to efficiently excite the SPP guided mode with an external infrared laser. The effective indices used in the numerical simulations are indicated on the figure. (b) Atomic force microscopy image of the DLSPPW. The dimensions of the waveguide are 600 nm height, 400 nm width,, and 65 μm length. (c) Averaged spontaneous emission intensity for increasing pump powers (dots, standard deviation indicated) with a linear regression (blue line). The inset shows a homogeneous emission inside the waveguide since an extended illumination was used.
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