@article{MGS+2009,
abstract = {We describe the 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.},
author = {Marini, A and Gorbach, A V and Skryabin, D V and Zayats, A V},
journal = {Opt. Lett.},
keywords = {Nonlinear optics at surfaces,Surface plasmons},
month = {sep},
number = {18},
pages = {2864--2866},
publisher = {OSA},
title = {{Amplification of surface plasmon polaritons in the presence of nonlinearity and spectral signatures of threshold crossover}},
url = {http://ol.osa.org/abstract.cfm?URI=ol-34-18-2864},
volume = {34},
year = {2009}
}