Mayy M, Zhu G, Webb A D, Ferguson H, Norris T, Podolskiy V A, Noginov M A
Opt Express. 2014 Apr 7;22(7):7773-82. doi: 10.1364/OE.22.007773.
Having in mind parametric amplification of surface plasmon polaritons (SPPs) as the final goal, we took the first step and studied in the Kretschmann geometry a simpler nonlinear optical process - second harmonic generation (SHG) enhanced by SPPs propagating at the interface between gold film and 2-methyl-4-nitroaniline (MNA). The experimentally demonstrated SHG efficiency was nearly 10(6) times larger than the one reported previously in the SPP system with different nonlinear optical material. The experimentally measured nonlinear conversion efficiency is estimated to be sufficient for parametric amplification of surface plasmon polaritons at ultra-short laser pumping.
考虑到表面等离激元极化激元（SPP）的参量放大作为最终目标，我们迈出了第一步，在Kretschmann几何结构中研究了一个更简单的非线性光学过程——在金膜与2-甲基-4-硝基苯胺（MNA）界面传播的SPP增强的二次谐波产生（SHG）。实验证明的SHG效率比之前在使用不同非线性光学材料的SPP系统中报道的效率大近10^6倍。实验测量的非线性转换效率估计足以在超短激光泵浦下实现表面等离激元极化激元的参量放大。
