8 papers
Unconventional topological edge states in one-dimensional gapless systems stemming from nonisolated hypersurface singularities
Hongwei Jia, Jing Hu, Ruo-Yang Zhang +7
Topologically protected edge states have been extensively studied in systems characterized by the topological invariants in band gaps (also called line gaps). In this study, we unv…
Observation of non-Hermitian boundary induced hybrid skin-topological effect excited by synthetic complex frequencies
Tianshu Jiang, Chenyu Zhang, Ruo-Yang Zhang +6
The hybrid skin-topological effect (HSTE) has recently been proposed as a mechanism where topological edge states collapse into corner states under the influence of the non-Hermiti…
Topological Singularities in Metasurface Scattering Matrices: From Nodal Lines to Exceptional Lines
Jingguang Chen, Wenzhe Liu, Jiajun Wang +6
Topological properties of photonic structures described by Hamiltonian matrices have been extensively studied in recent years. Photonic systems are often open systems, and their co…
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…
Direct measurement of topological invariants through temporal adiabatic evolution of bulk states in the synthetic Brillouin zone
Zhao-Xian Chen, Yuan-hong Zhang, Xiao-Chen Sun +5
Mathematically, topological invariants arise from the parallel transport of eigenstates on the energy bands, which, in physics, correspond to the adiabatic dynamical evolution of t…
Three-dimensional non-reciprocal transport in photonic topological heterostructure of arbitrary shape
Mudi Wang, Ruo-Yang Zhang, Chenyu Zhang +6
Electromagnetic wave propagation in three-dimensional space typically suffers omnidirectional scattering when encountering obstacles. In this study, we employed Chern vectors to co…