A theoretical study is presented for parametric compensation of power losses in surface plasmon polaritons (SPPs) along single metal–dielectric interfaces. An optical or near-infrared signal SPP with subwavelength transverse confinement and an idler SPP with 2–3 times longer wavelength are amplified parametrically by a broadside laser pump. Despite the fact that Drude losses are much higher than parametric gain, there is more than tenfold enhancement of the signal SPP propagation length, albeit at a reduced but detectable signal power level. Numerical results are presented for a silver surface interfaced with a polymer/dye or porous silicon layer that allow phase matching of the noncollinear parametric process.
© 2013 Optical Society of America
Original Manuscript: December 17, 2012
Manuscript Accepted: January 21, 2013
Published: March 14, 2013
A. T. Georges, "Parametric compensation of power losses in surface plasmon polaritons," J. Opt. Soc. Am. B 30, 904-908 (2013)