Janipour Mohsen, Şendur Kürşat
Faculty of Engineering and Natural Science, Sabanci University, Istanbul 34956, Turkey.
Materials (Basel). 2020 Apr 25;13(9):2007. doi: 10.3390/ma13092007.
Controlling the phase distribution of wavefronts using optical metasurfaces has led to interesting optical properties and applications. Here, we explore the control of phase distribution through polar-dielectric metasurfaces composed of doped SiC nanosphere arrays. We investigate the impact of doping concentration on the optical properties of SiC nano-spheres. Our results indicate that increasing the doping of SiC nanoparticles influenced electric dipolar resonances, whereas it did not change the dipolar resonances. Using this concept, we numerically studied the extension of this idea to form metasurface arrays of single, dimer and linear trimers of the doped SiC nano-spheres. Using different doping schemes, we studied the improvement of the reflectivity at frequencies greater than the longitudinal optical phonon frequency.
利用光学超表面控制波前的相位分布已带来了有趣的光学特性和应用。在此，我们探索通过由掺杂碳化硅纳米球阵列组成的极性介电超表面来控制相位分布。我们研究了掺杂浓度对碳化硅纳米球光学特性的影响。我们的结果表明，增加碳化硅纳米颗粒的掺杂会影响电偶极共振，而不会改变偶极共振。利用这一概念，我们通过数值模拟研究了将这一想法扩展到形成掺杂碳化硅纳米球的单聚体、二聚体和线性三聚体的超表面阵列。通过使用不同的掺杂方案，我们研究了在高于纵向光学声子频率的频率下反射率的提高。
