Yang Zhuo, Kuang Dengfeng
Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, and Institute of Modern Optics, Nankai University, Tianjin 300350, China.
Nanomaterials (Basel). 2019 Jan 29;9(2):166. doi: 10.3390/nano9020166.
We demonstrate a vortex beam generator meta-surface that consists of silver structures and graphene layers. The miniature material is just a few microns in size and the working part is only a few hundred nanometers thick. With the incidence of the linearly polarized beam, the meta-surface generates high-localized vector vortex beam with a high proportion of the longitudinal component. Being compared with the constituent part of the meta-surface, the multi-structure-combined meta-surface increases the localization by 250% and the longitudinal component proportion by 200%. Moreover, the above artificial material can generate vortex beams in broadband within the visible light range. These novel optical properties have the potential to improve the precision and sensitivity of nanoparticle manipulation. The study serves as a foundation in optical miniaturization and integration, nanoparticle manipulation, high-efficiency optical and quantum communication, and light-driven micro-tools.
我们展示了一种由银结构和石墨烯层组成的涡旋光束发生器超表面。这种微型材料尺寸仅为几微米，工作部分厚度仅为几百纳米。随着线偏振光束的入射，该超表面会产生具有高比例纵向分量的高度局域化矢量涡旋光束。与超表面的组成部分相比，多结构组合超表面的局域化增加了250%，纵向分量比例增加了200%。此外，上述人工材料可在可见光范围内的宽带中产生涡旋光束。这些新颖的光学特性有可能提高纳米粒子操纵的精度和灵敏度。该研究为光学小型化与集成、纳米粒子操纵、高效光学与量子通信以及光驱动微工具奠定了基础。
