School of Engineering and Applied Sciences.
Nano Lett. 2010 Dec 8;10(12):4880-3. doi: 10.1021/nl102747v. Epub 2010 Nov 3.
Enhancing nonlinear processes at the nanoscale is a crucial step toward the development of nanophotonics and new spectroscopy techniques. Here we demonstrate a novel plasmonic structure, called plasmonic nanocavity grating, which is shown to dramatically enhance surface nonlinear optical processes. It consists of resonant cavities that are periodically arranged to combine local and grating resonances. The four-wave mixing signal generated in our gold nanocavity grating is enhanced by a factor up to ≈2000, 2 orders of magnitude higher than that previously reported.
增强纳米尺度的非线性过程是发展纳米光子学和新光谱技术的关键步骤。在这里，我们展示了一种称为等离子体纳米腔光栅的新型等离子体结构，该结构可显著增强表面非线性光学过程。它由周期性排列的谐振腔组成，以结合局域和光栅共振。在我们的金纳米腔光栅中产生的四波混频信号增强了约 2000 倍，比以前报道的提高了 2 个数量级。
