亚衍射极限下单根半导体AlGaN纳米线和贵金属Au纳米粒子的光-物质相互作用
Light-matter interaction of single semiconducting AlGaN nanowire and noble metal Au nanoparticle in the sub-diffraction limit
摘要：
近场扫描光学显微镜（NSOM）不仅是对亚衍射极限物体进行成像的工具，而且是理解纳米结构内在性质的重要工具。为了理解使用NSOM技术在532 nm（2.33 eV）激发下在近场区域中的光-物质相互作用，我们选择了通过汽液固（VLS）机制与金属Au纳米颗粒（NP）催化剂一起生长的直径约120 nm的隔离的单个半导体AlGaN纳米线（NW）。从不同的原生缺陷相关的能量状态的AlGaN的电子跃迁的作用进行了讨论，在理解的NSOM图像的半导体NW。在纳米线的VLS生长机制中，还观察到了Au NP的NSOM图像中激发激光的强表面等离子体共振吸收效应。可沃
英文摘要：
The near field scanning optical microscopy (NSOM) is not only a tool for imaging of sub-diffraction limited objects but also a prominent characteristic tool for understanding the intrinsic properties of the nanostructures. In order to understand the light-matter interactions in the near field regime using NSOM technique with an excitation of 532 nm (2.33 eV), we selected an isolated single semiconducting AlGaN nanowire (NW) of diameter ~120 nm grown via vapor liquid solid (VLS) mechanism along with metallic Au nanoparticle (NP) catalyst. The role of electronic transitions from different native defect related energy states of AlGaN are discussed in understanding the NSOM images for the semiconducting NW. The effect of strong surface plasmon resonance absorption of excitation laser in the NSOM images for Au NP, involved in the VLS growth mechanism of NWs, is also observed. Keywo
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