利用PEEM对等离激元场动力学演化的高时空分辨近场表征研究进展

Research Progress in High Spatial-Temporal Near-Field Characterization of Dynamical Evolution of Plasmon Fields Using PEEM

等离激元因具有超衍射极限汇聚、高近场增强等特性,因此被广泛应用于传感、光伏、光催化和光电探测等研究领域。超快光辐照金属纳米结构形成的超快等离激元场不仅拥有传统等离激元特性,还具有了极小时间尺度特性,为人们在飞秒、纳米尺度探寻与操控光与物质的相互作用提供了一条有效途径。由于等离激元场的动力学演化过程直接影响到等离激元传感、探测等器件的性能以及光催化效果,因此对等离激元场动力学演化的直接近场表征将有助于人们从微观尺度探寻和揭示等离激元与物质的相互作用过程,对于设计和优化等离激元纳米光电器件等具有重要意义。本文综述了利用ITR-PEEM对等离激元场动力学演化的高时空分辨近场表征的研究进展。

Plasmon is widely used in research fields such as sensing,photovoltaic,photocatalysis and photodetection for its characteristics of super-diffractionlimit convergence and high near-field enhancement.Ultrafast plasmon fieldformed by ultrafast light-irradiated metal nanostructures not only hastraditional plasmon characteristics,but also has very small time-scalecharacteristics,which provides an effective method for searching andmanipulating the interaction between light and matter at femtosecond andnanoscale.Since the dynamical evolution process of the plasmon field directlyaffects the performance of plasmon sensing and detecting devices as well as thephotocatalytic effect,directly near-field characterization of the dynamicevolution of the plasmon field will help the exploration and revealing of theinteraction between plasmon and matter in microscopic scale,which is of greatsignificance for the design and optimization of plasmonic nano-photoelectricdevices.This paper reviews the advances in high spatial revolution near-fieldcharacterization of dynamical evolution of plasmon fields using ITR-PEEM.