Nanophotonics Centre, Cavendish Laboratory, University of Cambridge, Cambridge, U.K.
Nano Lett. 2010 May 12;10(5):1787-92. doi: 10.1021/nl1004114.
We demonstrate a novel way to actively tune surface plasmons by fabricating plasmonic nanostructures on stretchable elastomeric films. This allows reversible modification of the metal geometry on the nanometer scale. Using 100 nm scale Au nanoparticle dimers whose spacing is stretch-tuned reveals radically different spectral tuning than previously reported for sub-10-nm nanoparticles, but which can be explained by a revised interpretation of existing models. Tuning plasmons in this way offers a much more robust way than lithography to interrogate the physics of localized plasmons and has applications in optimized surface-enhanced luminescence and Raman scattering.
我们展示了一种通过在可拉伸弹性薄膜上制造等离子体纳米结构来主动调谐表面等离激元的新方法。这允许在纳米尺度上对金属几何形状进行可逆修改。通过拉伸调节 100nm 尺度的 Au 纳米粒子二聚体的间距，揭示了与以前报道的亚 10nm 纳米粒子相比，光谱调谐有根本的不同，但可以通过对现有模型的修正解释来解释。以这种方式调谐等离激元比光刻更能可靠地探测局域等离激元的物理性质，并且在优化的表面增强荧光和拉曼散射中有应用。
