论文标题
通过阿泊尔激发增强的热光反应
Enhanced thermo-optical response by means of anapole excitation
论文作者
论文摘要
高折射率介电纳米结构提供了一个多功能平台，可以控制纳米级的光 - 物质相互作用，因为它们可以轻松地支持低损失的电气和磁模式。使它们非同寻常的另一个属性是，它们可以支持低辐射模式，即所谓的Anapole模式。在这项工作中，我们提出了一个基于使用介电anapole谐振器来扩增等离震纳米仪的热响应十倍的频谱anapole纳米仪。这将允许使用较低的光强度达到惊人的加热效果。作为概念证明，我们对用作加热源和硅磁盘的热质量响应进行了详细研究，该磁盘旨在支撑位于其中心的Anapole模式，该中心用作无焦谐振器。此外，我们利用Anapole激发轻松地将这些结构的热响应从SWIR转移到NIR范围。
High refractive index dielectric nanostructures offer a versatile platform to control light-matter interaction at the nanoscale as they can easily support electric and magnetic modes with low losses. An additional property that makes them extraordinary is that they can support low radiative modes, so-called anapole modes. In this work, we propose a spectrally tunable anapole nanoheater based on the use of a dielectric anapole resonator able to amplify ten-fold the thermal response of a plasmonic nanoheater. This would allow the use of lower light intensities to achieve striking heating effects. As proof of concept, we perform a detailed study of the thermo-plasmonic response of a gold nanoring used as heating source and a silicon disk, designed to support anapole modes, located in its center acting as anapolar resonator. Furthermore, we utilize the anapole excitation to easily shift the thermal response of these structures from SWIR to the NIR range.
