School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom.
Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig Maximilians University of Munich, 80539 Munich, Germany.
Phys Rev Lett. 2019 Oct 18;123(16):163901. doi: 10.1103/PhysRevLett.123.163901.
When the feature size of photonic structures becomes comparable or even smaller than the wavelength of light, the fabrication imperfections inevitably introduce disorder that may eliminate many functionalities of subwavelength photonic devices. Here we suggest a novel concept to achieve a robust band gap which can endure disorder beyond 30% as a result of the transition from photonic crystals to Mie-resonant metamaterials. By utilizing Mie-resonant metamaterials with high refractive index, we demonstrate photonic waveguides and cavities with strong robustness to position disorder, thus providing a novel approach to the band-gap-based nanophotonic devices with new properties and functionalities.
当光子结构的特征尺寸变得可与光的波长相比拟甚至更小的时候，制造缺陷不可避免地会引入无序，这可能会消除亚波长光子器件的许多功能。在这里，我们提出了一个新概念，通过从光子晶体到米氏谐振超材料的转变，实现了一种稳健的带隙，该带隙能够承受超过 30%的无序。通过利用具有高折射率的米氏谐振超材料，我们展示了具有强位置无序鲁棒性的光子波导和腔，从而为具有新特性和功能的基于带隙的纳米光子器件提供了一种新方法。
