Experimental study of the linear and nonlinear optical properties of silver nanowires and the spatio-temporal control of the propagation of excited plasmons

表面等离子体是由于电磁波与金属的自由电子气的共振相互作用而限制在金属-介质界面上传播的电磁表面模。在这个研究项目中，我们将研究银纳米线中的表面等离子激元。长度大于1μm的纳米线可以支持法布里-珀罗模式。单根纳米线的这种模式将用全内反射光谱来研究，而由超短光脉冲激发的等离子体模的全振幅和全相位将用光谱干涉法来表征。这些详细的信息将使优化脉冲形状成为可能，使用学习算法来提供复杂的波形，以便获得对等离子激元模式的完全时空控制。

Surface Plasmons are propagating electromagnetic surface modes confined at a metal-dielectric interface due to the resonant interaction of the electromagnetic wave with the free electron gas of the metal. In this research program Surface Plasmons in silver nanowires will be studied. Nanowires with a length greater than 1 μm can support Fabry-Perot modes. Such modes of an individual nanowire will be investigated by total-internal reflectivity spectroscopy.The full amplitude and phase of the Plasmon modes excited by ultrashort optical pulses will be characterized using spectral interferometry. This detailed information will make it possible to optimize the pulse shape, using learning algorithms to provide complex waveforms in order to obtain a full spatio-temporal control of the Plasmon modes.