纳米金属等离子体激元

IF 8.2 1区 化学 Q1 CHEMISTRY, PHYSICAL
Abdellatif Akjouj , Gae¨tan Lévêque , Sabine Szunerits , Yan Pennec , Bahram Djafari-Rouhani , Rabah Boukherroub , Leonard Dobrzyński
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引用次数: 0

摘要

纳米金属是一种纳米级的金属结构。等离子体是电子气体的集体激发。等离子体激元是与电磁波耦合的等离子体激元。金属体中的等离子体激元与光场不耦合,而金属薄膜在受光激发时可以维持表面极化。这可以通过一个消失的棱镜耦合,表面波纹的帮助,以确保动量匹配等实现。这种表面极化子以平行于金属表面的相干电子振荡方式传播,并以指数垂直于金属表面的方式衰减。因此,电磁能量被限制在垂直于金属表面的衍射极限以下的尺寸。波纹可以进一步作为表面等离子体的光散射中心,允许制造有趣的光学器件,如全光晶体管。这篇表面科学报告回顾了目前关于纳米结构和波导表面极化的文献。对模型、计算机模拟和实验进行了回顾,并通过简单的综合实例加以说明。利用等离子体纳米结构进行短距离和远距离传感的实验和理论研究。概述了纳米金属的一些应用。金属粒子与薄膜之间的相互作用是由若干定域和离域表面等离子体之间的相互作用引起的。本文还包括在近场与物质相互作用中荧光提取的应用。然而,本报告不可能详尽无遗。这将是一项永无止境的任务。它为未来的表面科学报告留下了空间,这些报告是由同事们发表的,他们的成果没有出现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nanometal plasmonpolaritons

A nanometal is a nanometric metallic structure. A plasmon is a collective excitation of an electron gas. A plasmon polariton is a plasmon coupled to an electromagnetic wave. Whereas plasmons in bulk metal do not couple to light fields, a thin metal film can sustain surface polaritons when excited by light. This can be achieved via an evanescent prism coupling, the help of surface corrugations to ensure momentum matching, etc. Such surface polaritons propagate as coherent electron oscillations parallel to the metal surface and decay exponentially perpendicular to it. Thus, the electromagnetic energy is confined to dimensions below the diffraction limit perpendicular to the metal surface. Corrugations can further act as light scattering centers for surface plasmons, allowing for the fabrication of interesting optical devices such as an all-optical transistor. This surface science report reviews the present literature on surface polaritons in nanostructures and waveguides. Models, computer simulations and experiments are reviewed and illustrated by simple comprehensive examples. Experimental and theoretical studies of short and long range sensing using plasmonic nanostructures are in particular considered. Some applications for nanometals are outlined. The interactions between metallic particles and films due to the interactions between several localized and delocalized surface plasmons are among the examples. Applications to fluorescence extraction in the interaction between near-field and matter are also included here. Nevertheless this report cannot be an exhaustive one. This would be an endless task. It leaves space for future Surface Science Reports issues by colleagues whose achievements do not appearhere.

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来源期刊
Surface Science Reports
Surface Science Reports 化学-物理:凝聚态物理
CiteScore
15.90
自引率
2.00%
发文量
9
审稿时长
178 days
期刊介绍: Surface Science Reports is a journal that specializes in invited review papers on experimental and theoretical studies in the physics, chemistry, and pioneering applications of surfaces, interfaces, and nanostructures. The topics covered in the journal aim to contribute to a better understanding of the fundamental phenomena that occur on surfaces and interfaces, as well as the application of this knowledge to the development of materials, processes, and devices. In this journal, the term "surfaces" encompasses all interfaces between solids, liquids, polymers, biomaterials, nanostructures, soft matter, gases, and vacuum. Additionally, the journal includes reviews of experimental techniques and methods used to characterize surfaces and surface processes, such as those based on the interactions of photons, electrons, and ions with surfaces.
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