Development and Application of Surface Plasmon Polaritons on Optical Amplification
Figure 13
(a) Schematic diagram of the room-temperature plasmon laser showing a thin CdS square atop a silver substrate separated by a 5 nm MgF2 gap, where the most intense electric fields of the device reside. (b) The spontaneous emission spectrum at a peak pump intensity of 1,960 MW cm−2 shows obvious cavity modes despite being below the threshold, which indicates the excellent cavity feedback. The inset shows electric-field-intensity distribution of a TM mode in the x and y directions.
