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典型文献
Strong interlayer coupling and stable topological flat bands in twisted bilayer photonic Moiré superlattices
文献摘要:
The moiré superlattice of misaligned atomic bilayers paves the way for designing a new class of materials with wide tunability.In this work,we propose a photonic analog of the moiré superlattice based on dielectric resonator quasi-atoms.In sharp contrast to van der Waals materials with weak interlayer coupling,we realize the strong coupling regime in a moiré superlattice,characterized by cascades of robust flat bands at large twist-angles.Surprisingly,we find that these flat bands are characterized by a non-trivial band topology,the origin of which is the moiré pattern of the resonator arrangement.The physical manifestation of the flat band topology is a robust one-dimensional conducting channel on edge,protected by the reflection symmetry of the moiré superlattice.By explicitly breaking the underlying reflection symmetry on the boundary terminations,we show that the first-order topological edge modes naturally deform into higher-order topological corner modes.Our work pioneers the physics of topological phases in the designable platform of photonic moiré superlattices beyond the weakly coupled regime.
文献关键词:
作者姓名:
Chang-Hwan Yi;Hee Chul Park;Moon Jip Park
作者机构:
Center for Theoretical Physics of Complex Systems,Institute for Basic Science(IBS),Daejeon 34126,Republic of Korea
引用格式:
[1]Chang-Hwan Yi;Hee Chul Park;Moon Jip Park-.Strong interlayer coupling and stable topological flat bands in twisted bilayer photonic Moiré superlattices)[J].光:科学与应用(英文版),2022(10):2523-2529
A类:
B类:
Strong,interlayer,coupling,stable,topological,flat,bands,twisted,photonic,Moir,superlattices,moir,misaligned,atomic,bilayers,paves,way,designing,new,class,materials,wide,tunability,In,this,work,propose,analog,dielectric,resonator,quasi,atoms,sharp,contrast,van,Waals,realize,strong,regime,characterized,by,cascades,robust,large,angles,Surprisingly,find,that,these,are,trivial,topology,origin,which,pattern,arrangement,physical,manifestation,dimensional,conducting,channel,edge,protected,reflection,symmetry,By,explicitly,breaking,underlying,boundary,terminations,show,first,order,modes,naturally,deform,into,higher,corner,Our,pioneers,physics,phases,designable,platform,beyond,weakly,coupled
AB值:
0.557588
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