549 citations · 1.3k across the 18 of their papers we have counts for
18 papers
Chiral Valley Edge States
Jian-Wei Liu, Gui-Geng Liu, Bo Zhang +7
Valleytronics has emerged as a promising paradigm, enabling comprehensive control of the valley degree of freedom (DoF) for energy-efficient and high-speed information processing.…
Realization of time-reversal invariant photonic topological Anderson insulators
Xiao-Dong Chen, Zi-Xuan Gao, Xiaohan Cui +5
Disorder, which is ubiquitous in nature, has been extensively explored in photonics for understanding the fundamental principles of light diffusion and localization, as well as for…
Observation of gapless corner modes in synthetic translation dimensions
Wen-Jin Zhang, Hao-Chang Mo, Wen-Jie Chen +2
The introduction of synthetic dimensions in topological photonic systems enriches the exploration of topological phase of light in higher-dimensional space beyond three-dimensional…
Topological temporal boundary states in a non-Hermitian spatial crystal
Mingwei Li, Jianwei Liu, Xulong Wang +3
Periodic modulation of the material index in time opens momentum gaps. Such systems are regarded as the temporal analogue of common spatial crystals, wherein the bandgaps open in t…
Symmetry-protected topological exceptional chains in non-Hermitian crystals
Ruo-Yang Zhang, Xiaohan Cui, Wen-Jie Chen +2
In non-Hermitian systems, the defective band degeneracies, so-called exceptional points (EPs), can form robust exceptional lines (ELs) in 3D momentum space in the absence of any sy…
Second Chern crystals in four-dimensional synthetic translation space with inherently nontrivial topology
Xiao-Dong Chen, Fu-Long Shi, Jian-Wei Liu +4
Topological states, first known as quantum Hall effect or Chern insulating crystal, have been generalized to many classical wave systems where potential applications such as robust…
Ideal Nodal Rings of One-Dimensional Photonic Crystals in the Visible Region
Wei-Min Deng, Ze-Min Chen, Meng-Yu Li +4
Three-dimensional (3D) artificial metacrystals host rich topological phases, such as Weyl points, nodal rings and 3D photonic topological insulators. These topological states enabl…
Photonic nodal lines with quadrupole Berry curvature distribution
Dongyang Wang, Biao Yang, Ruo-Yang Zhang +4
In periodic systems, nodal lines are loops in the three-dimensional momentum space where two bands are degenerate with each other. Nodal lines exhibit rich topological features as…
Distortionless pulse transmission in valley photonic crystal slab waveguide
Fu-Long Shi, Yuan Cao, Xiao-Dong Chen +4
Valley photonic crystal is one type of photonic topological insulator, whose realization only needs P-symmetry breaking. The domain wall between two valley-contrasting photonic cry…
Angular momentum-dependent topological transport and its experimental realization using a transmission line network
Tianshu Jiang, Meng Xiao, Wenjie Chen +4
Novel classical wave phenomenon analogs of the quantum spin Hall effect are mostly based on the construction of pseudo-spins. Here we show that the non-trivial topology of a system…
Symmetry recovery of exceptional points and their dynamical encircling in a two-state system
Xu-Lin Zhang, Shubo Wang, Wen-Jie Chen +2
Exceptional points are degeneracies in non-Hermitian systems. A two-state system with parity-time (PT) symmetry usually has only one exceptional point beyond which the eigenmodes a…
Metamaterials with index ellipsoids at arbitrary k-points
Wen-Jie Chen, John B. Pendry, C. T. Chan
We propose and investigate a new type of metamaterial structure composing of several interpenetrating wire meshes. Calculated band structures show that they exhibit index ellipsoid…
Multi Weyl Points and the Sign Change of Their Topological Charges in Woodpile Photonic Crystals
Ming-Li Chang, Meng Xiao, Wen-Jie Chen +1
We show that Weyl points with topological charges 1 and 2 can be found in very simple chiral woodpile photonic crystals, which can be fabricated using current techniques down to th…
Experimental observation of robust surface states on photonic crystals possessing single and double Weyl points
Wen-Jie Chen, Meng Xiao, C. T. Chan
We designed and fabricated a time-reversal invariant Weyl photonic crystal that possesses single Weyl nodes with topological charge of 1 and double Weyl nodes with a higher topolog…
Synthetic gauge fields and Weyl point in Time-Reversal Invariant Acoustic Systems
Meng Xiao, Wen-Jie Chen, Wen-Yu He +2
Inspired by the discovery of quantum hall effect and topological insulator, topological properties of classical waves start to draw worldwide attention. Topological non-trivial ban…
Topological Invariants in Point Group Symmetric Photonic Topological Insulators
Xiao-Dong Chen, Zi-Lan Deng, Wen-Jie Chen +2
We proposed a group-theory method to calculate topological invariant in bi-isotropic photonic crystals invariant under crystallographic point group symmetries. Spin Chern number ha…
Experimental realization of photonic topological insulator in a uniaxial metacrystal waveguide
Wen-Jie Chen, Shao-Ji Jiang, Xiao-Dong Chen +2
Achieving robust transport has attracted much attention in both electronic and photonic systems. Time-reversal invariant photonic crystal can be employed to realize backscattering-…
Observation of backscattering-immune chiral electromagnetic modes without time reversal breaking
Wen-Jie Chen, Jian-Wen Dong, Zhi Hong Hang +3
A strategy is proposed to realize robust transport in time reversal invariant photonic system. Using numerical simulation and microwave experiment, we demonstrate that a chiral gui…