Development and Application of Surface Plasmon Polaritons on Optical Amplification
Figure 6
(a) Experimental setup for the optical measurements: a He-Ne laser light is coupled to SPPs on the G1 grating and excites signal SPPs via QD fluorescence. The amplifying medium is continuously pumped with a second He-Ne laser. The signal from the decoupling grating (G2) is collected into an optical fiber connected to the spectrometer. (b) The dependence of the propagation length of the signal SPPs on the pump intensity. The SPP propagation lengths on Au/semi-infinite polymer and Au/air interfaces are also shown.
