231 citations · 900 across the 21 of their papers we have counts for
21 papers
Topological metal-insulator transitions in one-dimensional non-Hermitian quasicrystals: beyond PT-symmetry
Guangjie Zhang, Bing Shao, Longwen Zhou +2
One-dimensional non-Hermitian quasicrystals with parity and time-reversal (PT) symmetry can simultaneously exhibit localization-delocalization transition, topological phase transit…
Lateral Shift as a Control Knob for Localization Transitions in a Quasiperiodic Ladder
Bing Shao, Guangjie Zhang, Longwen Zhou +2
This work reports rich localization-delocalization transitions in a quasiperiodic ladder, of which the two legs are subject to the same quasiperiodic onsite potential but can be sh…
Multiple topological transitions and spectral singularities in non-Hermitian Floquet systems
Weiwei Zhu, Longwen Zhou, Linhu Li +1
The interplay between Floquet driving and non-Hermitian gain/loss could give rise to intriguing phenomena including topological funneling of light, edge-state delocalization, anoma…
Topological phononic metamaterials
Weiwei Zhu, Weiyin Deng, Yang Liu +6
The concept of topological energy bands and their manifestations have been demonstrated in condensed matter systems as a fantastic paradigm toward unprecedented physical phenomena…
Photonic corner skin modes
Weiwei Zhu, Jiangbin Gong
Useful in the enhancement of light-matter interaction, localization of light is at the heart of photonics studies. Different approaches have been proposed to localize light, includ…
Topological modes and beyond
Weiwei Zhu, Jiangbin Gong, Raditya Weda Bomantara
This short Perspective article presents an overview of the discovery of topological modes as well as their physical significance in quantum computing and the understanding of a…
Anomalous Floquet non-Hermitian skin effect in a ring resonator lattice
He Gao, Haoran Xue, Zhongming Gu +6
We present a one-dimensional coupled ring resonator lattice exhibiting a variant of the non- Hermitian skin effect (NHSE) that we call the anomalous Floquet NHSE. Unlike existing a…
Hybrid skin-topological modes without asymmetric couplings
Weiwei Zhu, Jiangbin Gong
Non-Hermitian skin effect (NHSE) in non-Hermitian lattice systems, associated with a point gap on the complex energy plane, has attracted great theoretical and experimental interes…
Tunable two-dimensional laser arrays with zero-phase locking
Wei Xin Teo, Weiwei Zhu, Jiangbin Gong
Two-dimensional (2D) laser arrays are shown to be achievable at a large scale by exploiting the interplay of higher-order topological insulator (HOTI) physics and the so-called non…
Floquet higher-order Weyl and nexus semimetals
Weiwei Zhu, Muhammad Umer, Jiangbin Gong
This work reports the general design and characterization of two exotic, anomalous nonequilibrium topological phases. In equilibrium systems, the Weyl nodes or the crossing points…
Symmetry Analysis of Anomalous Floquet Topological Phases
Weiwei Zhu, Yidong Chong, Jiangbin Gong
The topological characterization of nonequilibrium topological matter is highly nontrivial because familiar approaches designed for equilibrium topological phases may not apply. In…
Delocalization of topological edge states
Weiwei Zhu, Wei Xin Teo, Linhu Li +1
The non-Hermitian skin effect (NHSE) in non-Hermitian lattice systems depicts the exponential localization of eigenstates at system's boundaries. It has led to a number of counter-…
Time-periodic corner states from Floquet higher-order topology
Weiwei Zhu, Haoran Xue, Jiangbin Gong +2
The recent discoveries of higher-order topological insulators (HOTIs) have shifted the paradigm of topological materials, which was previously limited to topological states at boun…
Floquet higher order topological insulator in a periodically driven bipartite lattice
Weiwei Zhu, Y. D. Chong, Jiangbin Gong
Floquet higher order topological insulators (FHOTIs) are a novel topological phase that can occur in periodically driven lattices. An appropriate experimental platform to realize F…
Direct dynamical characterization of higher-order topological insulators with nested band inversion surfaces
Linhu Li, Weiwei Zhu, Jiangbin Gong
Higher-order topological insulators (HOTIs) are systems with topologically protected in-gap boundary states localized at their -dimensional boundaries, with the system d…
Four-Dimensional Higher-Order Chern Insulator and Its Acoustic Realization
Ze-Guo Chen, Weiwei Zhu, Yang Tan +2
We present a theoretical study and experimental realization of a system that is simultaneously a four-dimensional (4D) Chern insulator and a higher-order topological insulator (HOT…
Seeing Topological Order and Band Inversion in Optical Diatomic Chain
Jun Jiang, Zhiwei Guo, Weiwei Zhu +4
Recent realizations of exotic topological states in condensed matter and cold atoms have advanced the exploration for topological characteristics, such as invariant topological ord…
Simultaneous Observation of Topological Edge State and Exceptional Point in an Open and Non-Hermitian System
Weiwei Zhu, Xinsheng Fang, Dongting Li +4
This paper reports on the experimental observation of topologically protected edge state and exceptional point in an open and Non-Hermitian system. While the theoretical underpinni…
Zak phase and band inversion in dimerized one-dimensional locally resonant metamaterials
Weiwei Zhu, Ya-qiong Ding, Jie Ren +4
Zak phase, which refers to the Berry's phase picked up by a particle moving across the Brillouin zone, characterizes the topological properties of Bloch bands in one-dimensional pe…
Generating electromagnetic modes with fine tunable orbital angular momentum by planar topological circuits
Yuan Li, Yong Sun, Weiwei Zhu +5
Metamaterials made of periodic arrangements of electric permittivity and magnetic permeability and arrays of resonators can provide optic properties unexperienced in conventional m…
Simulating Quantum Spin Hall Effect in Topological Lieb Lattice of Linear Circuit
Weiwei Zhu, Shanshan Hou, Yang Long +2
Inspired by the topological insulator circuit proposed and experimentally verified by Jia., et al. \cite{1}, we theoretically realized the topological Lieb lattice, a line centered…