607 citations · 3.3k across the 29 of their papers we have counts for
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Direct measurement of acoustic spectral density and fractional topological charge
Hao Ge, Zi-Wei Long, Xiang-Yuan Xu +5
Local density-of-states (LDOS) is a fundamental spectral property that plays a central role in various physical phenomena such as wave-matter interactions. Here, we report on the d…
A review on non-Hermitian skin effect
Xiujuan Zhang, Tian Zhang, Ming-Hui Lu +1
The past decades have witnessed the flourishing of non-Hermitian physics in non-conservative systems, leading to unprecedented phenomena of unidirectional invisibility, enhanced se…
Critical couplings in topological-insulator waveguide-resonator systems observed in elastic waves
Si-Yuan Yu, Cheng He, Xiao-Chen Sun +7
Waveguides and resonators are core components in the large-scale integration of electronics, photonics, and phononics, both in existing and future scenarios. In certain situations,…
Corner states and topological transitions in two-dimensional higher-order topological sonic crystals with inversion symmetry
Zhan Xiong, Zhi-Kang Lin, Hai-Xiao Wang +4
Macroscopic two-dimensional sonic crystals with inversion symmetry are studied to reveal higher-order topological physics in classical wave systems. By tuning a single geometry par…
Dimensional hierarchy of higher-order topology in three-dimensional sonic crystals
Xiujuan Zhang, Bi-Ye Xie, Hong-Fei Wang +5
Topological phases of matter have been extensively studied for their intriguing bulk and edge properties. Recently, higher-order topological insulators with boundary states that ar…
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…
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…
A Monolithic Topologically Protected Phononic Circuit
Si-Yuan Yu, Cheng He, Zhen Wang +6
Precise control of elastic waves in modes and coherences is of great use in reinforcing nowadays elastic energy harvesting/storage, nondestructive testing, wave-mater interaction,…
Accidental degeneracy of double Dirac cones in a phononic crystal
Ze-Guo Chen, Xu Ni, Ying Wu +5
Artificial honeycomb lattices with Dirac cone dispersion provide a macroscopic platform to study the massless Dirac quasiparticles and their novel geometric phases. In this paper,…