We report on wavelength-tunable and plasmon-enhanced four-wave mixing (4WM) on an Al grating. When surface plasmons (SPs) are excited at the first and second pump wavelengths, the electromagnetic fields near the grating surface are dramatically enhanced and the corresponding 4WM signals are enhanced by factors of 177 and 42 compared with off resonant conditions. The maximum output power of the 4WM signal is as high as 25 nW. Moreover, by fixing the first pump beam to the SP excitation angle and tuning the second pump beam from 1200 to 1550 nm, we obtain a tunable and enhanced 4WM output from 539 to 600 nm. This setup can potentially be applied to frequency conversion, beam steering and dispersion control.

我们报告了铝光栅上的波长可调和等离子体增强四波混合 (4WM)。当表面等离子体 (SP) 在第一和第二泵浦波长下被激发时，光栅表面附近的电磁场显着增强，与非共振条件相比，相应的 4WM 信号增强了 177 和 42 倍。4WM 信号的最大输出功率高达 25 nW。此外，通过将第一个泵浦光束固定到 SP 激发角并将第二个泵浦光束从 1200 nm 调整到 1550 nm，我们获得了从 539 nm 到 600 nm 的可调和增强的 4WM 输出。这种设置可以潜在地应用于频率转换、光束控制和色散控制。