光与金属微纳结构表面自由电子振荡的耦合形成表面等离激元共振,表现出亚波长尺度的光场局域能力,可有效增强光与物质的相互作用。对等离激元光热效应研究的发展历程进行回顾,总结了几种典型的等离激元辅助的光热转换机理和调控方式。其后,重点介绍等离激元光热效应在太阳能蒸气产生中的调控和应用,一方面从体块加热到界面加热研究热利用率的提高,另一方面从单一频率吸收到宽光谱吸收研究光吸收效率的提高。最后对等离激元光热效应面临的挑战和机遇进行展望。

The coupling of light and free electron oscillation on the surface of the metal micro-nano structures results in surface plasmon resonance, exhibiting the local structure of the light field at the sub-wavelength scale, and effectively enhances the interaction between the light and material. Further, the development of research on the photothermal effect of plasmons is reviewed. Subsequently, the mechanism and regulation of photothermal transformation assisted by plasmons are summarized. The regulation and application of the photothermal effect of plasmons in solar vapor generation are introduced. On the one hand, the improvement of the heat utilization rate from block heating to interface heating is studied; on the other hand, the improvement of light absorption efficiency from single frequency absorption to wide spectrum absorption is also studied. Finally, the challenges and opportunities of the photothermal effects of equivalent ionizers are discussed.