Topology-optimized dual-polarization Dirac cones
Topology-optimized dual-polarization Dirac cones
复制标题
DOI：
10.1103/physrevb.97.081408
复制
发表时间：
2017-05
影响因子：
3.7
通讯作者：
Zin Lin;Lysander Christakis;Yang Li;E. Mazur;Alejandro W. Rodriguez;Marko Lonvcar
中科院分区：
文献类型：
--
作者：
Zin Lin;Lysander Christakis;Yang Li;E. Mazur;Alejandro W. Rodriguez;Marko Lonvcar
我们应用大规模的计算技术，被称为拓扑优化，光子狄拉克锥的反设计。特别地，我们报告了各种光子晶体几何形状，可以在简单的各向同性介电材料中实现，它们具有双极化狄拉克锥。我们提出了不同对称类型的光子晶体，如四重和六重旋转对称，在布里渊带的不同点上有狄拉克锥。所展示的和相关的优化技术为波段结构工程和操纵周期性介质中的光传播开辟了道路，并可能应用于奇异的光学现象，如有效零折射率介质和拓扑光子学。
We apply a large-scale computational technique, known as topology optimization, to the inverse design of photonic Dirac cones. In particular, we report on a variety of photonic crystal geometries, realizable in simple isotropic dielectric materials, which exhibit dual-polarization Dirac cones. We present photonic crystals of different symmetry types, such as fourfold and sixfold rotational symmetries, with Dirac cones at different points within the Brillouin zone. The demonstrated and related optimization techniques open avenues to band-structure engineering and manipulating the propagation of light in periodic media, with possible applications to exotic optical phenomena such as effective zero-index media and topological photonics.