Photothermal energy conversion in plasmonic nanoantennas as a new path for the local growth of ZnO in nanophotonic devices
Photothermal energy conversion in plasmonic nanoantennas as a new path for the local growth of ZnO in nanophotonic devices
复制标题
等离子体纳米天线中的光热能量转换是纳米光子器件中 ZnO 局部生长的新途径
DOI：
10.1117/12.2577176
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
K. Sasaki
中科院分区：
文献类型：
--
作者：
C. L. Pin;H. Fujiwara;T. Suzuki;K. Sasaki
在这项工作中，我们探索了一种新的自下而上的方法的基础上等离子体辅助水热合成（PAHS），以实现本地化的氧化锌（ZnO）的混合纳米光子器件的生长。通过设计金纳米间隙天线，我们实现了对电场和产生的热量的定位和增强的有效控制。设计了一种纳米蝴蝶天线，以实现偏振相关的热局部化和局部电场增强。由于选择性等离子体激元加热，在纳米间隙天线的目标位置处生长几nm厚的ZnO层。我们还数值研究了由材料合成引起的天线产生的热量的反作用，并展示了PAHS如何可以用作自限生长方法。PAHS方法为混合纳米光子器件的设计和制造开辟了新的前景。
In this work, we explore a new bottom-up approach based on plasmon-assisted hydrothermal synthesis (PAHS) to achieve localized growth of zinc oxide (ZnO) in hybrid nanophotonic devices. By engineering gold nanogap antennas, we achieve efficient control over the localization and enhancement of both the electric field and the generated heat. A nanobutterfly antenna is designed to achieve both polarization-dependent heat localization and localized electric field enhancement. A few-nm-thick ZnO layer is grown at the targeted location of the nanogap antenna thanks to selective plasmonic heating. We also numerically study the back-action induced by the material synthesis on the heat generated by the antenna and show how PAHS can be used as a self-limited growth method. The PAHS method opens new perspectives for the design and fabrication of hybrid nanophotonic devices.