拓扑(电路)
光子学
物理
无缝回放
相(物质)
简单(哲学)
双层
光子晶体
纳米光子学
量子力学
光学
凝聚态物理
数学
哲学
认识论
组合数学
膜
生物
遗传学
作者
Ki Young Lee,Kwang Wook Yoo,Sangmo Cheon,Won-Jae Joo,Jae Woong Yoon,Seok Ho Song
标识
DOI:10.1103/physrevlett.128.053002
摘要
The notion of synthetic dimensions in artificial photonic systems has received considerable attention as it provides novel methods for exploring hypothetical topological phenomena as well as potential device applications. Here, we present nanophotonic manifestation of a two-dimensional topological nodal phase in bilayer resonant grating structures. Using the mathematical analogy between a topological semimetal and vertically asymmetric photonic lattices, we show that the interlayer shift simulates an extra momentum dimension for creating a two-dimensional topological nodal phase. We present a theoretical model and rigorous numerical analyses showing the two nodal points that produce a complex gapless band structure and localized edge states in the topologically nontrivial region. Therefore, our results provide a practical scheme for producing high-dimensional topological effects in simple low-dimensional photonic structures.
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