Attosecond nanoplasmonic-field microscope
Attosecond nanoplasmonic-field microscope
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DOI：
10.1038/nphoton.2007.169
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发表时间：
2007-09-01
期刊：
影响因子：
35
通讯作者：
Krausz, Ferenc
中科院分区：
文献类型：
--
作者：
Stockman, Mark I.;Kling, Matthias F.;Krausz, Ferenc
纳米等离子体激元研究金属纳米结构表面的集体电子动力学，这是由于表面等离子体激元的激发而产生的。这一领域最近经历了快速发展，可能有利于纳米级计算和信息存储、物理、化学和生物纳米物体的超灵敏检测和光谱以及光电器件的开发等应用。由于其宽光谱带宽，表面等离子体激元经历超快动力学，时间尺度短至几百阿秒。到目前为止，位于纳米尺度的光场的时空动力学已经被隐藏起来，无法在真实时空域中直接访问。在这里，我们提出了一种方法，该方法将首次提供对纳米等离子体集体动力学的直接、非侵入性访问，具有纳米级空间分辨率和 100 阿秒量级的时间分辨率。该方法结合了光电子发射显微镜和阿秒条纹光谱，提供了一种探测纳米定域光场的有价值的方法，从基本角度以及纳米等离子体学的现有和潜在应用来看，这种方法都将很有趣。
Nanoplasmonics deals with collective electronic dynamics on the surface of metal nanostructures, which arises as a result of excitations called surface plasmons. This field, which has recently undergone rapid growth, could benefit applications such as computing and information storage on the nanoscale, the ultrasensitive detection and spectroscopy of physical, chemical and biological nanosized objects, and the development of optoelectronic devices. Because of their broad spectral bandwidth, surface plasmons undergo ultrafast dynamics with timescales as short as a few hundred attoseconds. So far, the spatiotemporal dynamics of optical fields localized on the nanoscale has been hidden from direct access in the real space and time domain. Here, we propose an approach that will, for the first time, provide direct, non-invasive access to the nanoplasmonic collective dynamics, with nanometre-scale spatial resolution and temporal resolution on the order of 100 attoseconds. The method, which combines photoelectron emission microscopy and attosecond streaking spectroscopy, offers a valuable way of probing nanolocalized optical fields that will be interesting both from a fundamental point of view and in light of the existing and potential applications of nanoplasmonics.