Alagappan G, Png C E
Department of Electronics and Photonics, Institute of High Performance Computing, Agency for Science, Technology, and Research (A-STAR), 1 Fusionopolis Way, #16-16 Connexis, 138632 Singapore.
Sci Rep. 2016 Aug 18;6:31620. doi: 10.1038/srep31620.
This article describes a new two-dimensional physical topology-merged lattice, that allows dense number of wave localization states. Merged lattices are obtained as a result of merging two lattices of scatters of the same space group, but with slightly different spatial resonances. Such merging creates two-dimensional scattering "beats" which are perfectly periodic on the longer spatial scale. On the shorter spatial scale, the systematic breakage of the translational symmetry leads to strong wave scattering, and this causes the occurrences of wave localization states. Merged Lattices promises variety of localization states including tightly confined, and ring type annular modes. The longer scale perfect periodicity of the merged lattice, enables complete prediction and full control over the density of the localization states and its' quality factors. In addition, the longer scale periodicity, also allows design of integrated slow wave components. Merged lattices, thus, can be engineered easily to create technologically beneficial applications.
本文描述了一种新的二维物理拓扑合并晶格,它允许大量的波局域态。合并晶格是通过合并具有相同空间群但空间共振略有不同的两个散射体晶格而得到的。这种合并产生了二维散射“拍频”,在较长的空间尺度上具有完美的周期性。在较短的空间尺度上,平移对称性的系统破坏导致强烈的波散射,这就导致了波局域态的出现。合并晶格有望产生多种局域态,包括紧密受限态和环形模式。合并晶格在较长尺度上的完美周期性,使得能够对局域态的密度及其品质因数进行完整的预测和完全控制。此外,较长尺度的周期性还允许设计集成慢波组件。因此,合并晶格可以很容易地进行设计,以创造出具有技术优势的应用。