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Visualization of higher-order topological insulating phases in two-dimensional dielectric photonic crystals
Bi-Ye Xie, Guang-Xu Su, Hong-Fei Wang +6
The studies of topological phases of matter have been extended from condensed matter physics to photonic systems, resulting in fascinating designs of robust photonic devices. Recen…
Symmetry-protected hierarchy of anomalous multipole topological band gaps in nonsymmorphic metacrystals
Xiujuan Zhang, Zhi-Kang Lin, Hai-Xiao Wang +5
Symmetry and topology are two fundamental aspects of many quantum states of matter. Recently, new topological materials, higher-order topological insulators, were discovered, featu…
Guiding Robust Valley-dependent Edge States by Surface Acoustic Waves
Zhen Wang, Fu-Kang Liu, Si-Yuan Yu +4
Recently, the concept of valley pseudospin, labeling quantum states of energy extrema in momentum space, has attracted enormous attention because of its potential as a new type of…
Topological Sound
Xiujuan Zhang, Meng Xiao, Ying Cheng +2
Recently, we witnessed a tremendous effort to conquer the realm of acoustics as a possible playground to test with sound waves topologically protected wave propagation. Acoustics d…
Observation of second-order topological insulators in sonic crystals
Xiujuan Zhang, Hai-Xiao Wang, Zhi-Kang Lin +5
Topological insulators with unique gapless edge states have revolutionized the understanding of electronic properties in solid materials. These gapless edge states are dictated by…
Experimental Observation of Acoustic Weyl Points and Topological Surface States
Hao Ge, Xu Ni, Yuan Tian +6
Weyl points emerge as topological monopoles of Berry flux in the three-dimensional (3D) momentum space and have been extensively studied in topological semimetals. As the underlyin…