表面等离激元光热效应研究进展

Research progress of surface plasmons mediated photothermal effects

表面等离激元微纳结构能够将光场束缚在亚波长尺度,实现突破光学衍射极限的光操控,并显著增强光与物质的相互作用.在基于表面等离激元机理的光电器件研究中,微纳结构的自身光吸收通常被认为是损耗,而通过光热效应,光吸收则可有效利用并转换成热能,其中的物理过程研究和应用是当前等离激元学领域的热点方向.本文回顾了近年来表面等离激元微纳结构光热效应的相关工作,聚焦于表面等离激元热效应的物理过程、热产生和热传导调控方式的研究进展.在此基础上,介绍了表面等离激元微纳结构在微纳加工、宽谱光热转换等方面的应用.

Plasmonic nanostructure can efficiently manipulate light on a subwavelength scale, which can break through the optical diffraction limit and significantly enhance the interaction between light and matter. In the study of photoelectric devices based on the plasmonic mechanism, the absorption of light in surface plasmons is usually considered as loss, which needs to be suppressed. However, based on the photothermal effect, the light absorption of plasmonic nanostructure can be effectively utilized and converted into heat. The research of this new type of nano-heat source is a hot topic in the field of plasmonics. In this paper, we review the recent progress of the study of photothermal effects of plasmonic nanostructure, focusing on the physical process of heating effects, and the methods to control the temperature distribution in both the process of heat generation and the process of delivery of heat. Finally, the applications of nano-heat source in the fields of nano-fabrication and broad-spectrum photothermal conversion are also presented.