Physics – Optics
Scientific paper
2009-09-14
Optics Letters, Vol. 34, Issue 18, pp. 2864-2866, (2009)
Physics
Optics
http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-34-18-2864
Scientific paper
We describe effects of nonlinearity on propagation of surface plasmon polaritons (SPPs) at an interface between a metal and an amplifying medium of the externally pumped two-level atoms. Using Maxwell equations we derive the nonlinear dispersion law and demonstrate that, the nonlinear saturation of the linear gain leads to formation of stationary SPP modes with the intensities independent from the propagation distance. Transition to the regime of stationary propagation is similar to the threshold crossover in lasers and leads to narrowing of the SPP spectrum.
Gorbach Andrey V.
Marini Andrea
Skryabin Dmitry V.
Zayats Anatoly V.
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