Fujiwara Hideki, Suzuki Tatsuro, Pin Christophe, Sasaki Keiji
Faculty of Engineering , Hokkai-Gakuen University , 1-1, Nishi 11, Minami 26 , Chuo-ku, Sapporo 064-0926 , Japan.
Research Institute for Electronic Science , Hokkaido University , N20W10 , Kitaku, Sapporo 001-0020 , Japan.
Nano Lett. 2020 Jan 8;20(1):389-394. doi: 10.1021/acs.nanolett.9b04073. Epub 2019 Dec 26.
The excitation of localized surface plasmon resonances (LSPRs) in metal nanostructures enables subwavelength photon localization and large electric field enhancement, which can be advantageously used to strongly enhance light-matter interactions at the nanoscale. For this purpose, efficient methods for deterministically handling and arranging nanomaterials at the exact position of the localized electric field are required. In this Letter, we propose a novel method based on a hydrothermal synthesis reaction to locally and selectively synthesize zinc oxide in a plasmonic nanoantenna. We first make evident the role of LSPR for achieving efficient heating of gold nanostructures. Then, by selectively addressing one of the LSPRs of a gold antenna, we demonstrate that localized zinc oxide formation at the targeted location of the antenna can be achieved due to the nanoscale confinement of the heat production.
金属纳米结构中局域表面等离子体共振（LSPR）的激发能够实现亚波长光子局域化和大幅电场增强，这可被有利地用于在纳米尺度上强烈增强光与物质的相互作用。为此，需要有有效的方法来确定性地操控纳米材料并将其排列在局域电场的精确位置。在本信函中，我们提出了一种基于水热合成反应的新方法，用于在等离子体纳米天线中局部且选择性地合成氧化锌。我们首先阐明了LSPR在实现金纳米结构高效加热方面的作用。然后，通过选择性地激发金天线的一种LSPR，我们证明了由于热产生的纳米尺度限制，能够在天线的目标位置实现局域氧化锌的形成。
