192 citations · 1.3k across the 26 of their papers we have counts for
26 papers
Efficient high-quality photon pair generation in modal phase-matched thin-film lithium niobate micro-ring resonators
Tingting Chen, Feihong Xue, Ryan Hogan +9
Efficient generation of high-quality photon pairs is essential for modern quantum technologies. Micro-ring resonator is an ideal platform for studying on-chip photon sources due to…
Topological Degeneracy Induced by Twisting
Han Peng, Qiang Wang, Meng Xiao +3
In recent years, twisting has emerged as a new degree of freedom that plays an increasingly important role in Bloch bands of various physical systems. However, there is currently a…
Localization of chiral edge states by the non-Hermitian skin effect
Gui-Geng Liu, Subhaskar Mandal, Peiheng Zhou +11
Quantum Hall systems host chiral edge states extending along the one-dimensional boundary of any two-dimensional sample. In solid state materials, the edge states serve as perfectl…
Multiple symmetry protected BIC lines in two dimensional synthetic parameter space
Fengyuan Zhang, Qiongqiong Chu, Qiang Wang +2
Bound states in the continuum (BICs) have attracted significant interest in recent years due to their unique optical properties, such as infinite quality factor and wave localizati…
Non-Hermitian Photonic Lattices: tutorial
Qiang Wang, Y. D. Chong
Non-Hermitian photonic lattices combine the peculiar consequences of energy non-conservation with the physics of bandstructures, giving rise to a variety of exotic properties not f…
Topological phenomena at topological defects
Zhi-Kang Lin, Qiang Wang, Yang Liu +4
There are two prominent applications of the mathematical concept of topology to the physics of materials: band topology, which classifies different topological insulators and semim…
Higher-order Dirac Semimetal in a Photonic Crystal
Zihao Wang, Dongjue Liu, Hau Tian Teo +3
The recent discovery of higher-order topology has largely enriched the classification of topological materials. Theoretical and experimental studies have unveiled various higher-or…
Amplification of quantum signals by the non-Hermitian skin effect
Qiang Wang, Changyan Zhu, You Wang +2
The non-Hermitian skin effect (NHSE) is a phenomenon whereby certain non-Hermitian lattice Hamiltonians, particularly those with nonreciprocal couplings, can host an extensive numb…
Double-bowl State in photonic Dirac nodal line semimetal
Mengying Hu, Ye Zhang, Xi Jiang +5
The past decade has seen a proliferation of topological materials for both insulators and semimetals in electronic systems and classical waves. Topological semimetals exhibit topol…
Generation and Tunability of Supermodes in Tamm Plasmon Topological Superlattices
Tong Qiao, Mengying Hu, Xi Jiang +3
In this study, we propose and experimentally demonstrate a novel kind of Tamm plasmon topological superlattice (TTS) by engineering Tamm photonic crystals (TPCs) belonging to a dif…
Probing rotated Weyl physics on nonlinear lithium niobate-on-insulator chips
Zhi-Wei Yan, Qiang Wang, Meng Xiao +3
Topological photonics, featured by stable topological edge states resistant to perturbations, has been utilized to design robust integrated devices. Here, we present a study explor…
Observation of Weyl point pair annihilation in a gyromagnetic photonic crystal
Gui-Geng Liu, Zhen Gao, Peiheng Zhou +9
Weyl semimetals are gapless three-dimensional (3D) phases whose bandstructures contain Weyl point (WP) degeneracies. WPs carry topological charge and can only be eliminated by mutu…
Observation of dislocation-induced topological modes in a three-dimensional acoustic topological insulator
Haoran Xue, Ding Jia, Yong Ge +6
The interplay between real-space topological lattice defects and the reciprocal-space topology of energy bands can give rise to novel phenomena, such as one-dimensional topological…
Vortex states in an acoustic Weyl crystal with a topological lattice defect
Qiang Wang, Yong Ge, Hong-xiang Sun +6
We design and implement a three dimensional acoustic Weyl metamaterial hosting robust modes bound to a one-dimensional topological lattice defect. The modes are related to topologi…
Observation of photonic antichiral edge states
Peiheng Zhou, Gui-Geng Liu, Yihao Yang +6
Chiral edge states are a hallmark feature of two-dimensional topological materials. Such states must propagate along the edges of the bulk either clockwise or counterclockwise, and…
Observation of Protected Photonic Edge States Induced By Real-Space Topological Lattice Defects
Qiang Wang, Haoran Xue, Baile Zhang +1
Topological defects (TDs) in crystal lattices are elementary lattice imperfections that cannot be removed by local perturbations, due to their real space topology. We show that add…
Exceptional Cones in 4D Parameter Space
Qiang Wang, Kun Ding, Hui Liu +2
The notion of synthetic dimensions has expanded the realm of topological physics to four dimensional (4D) space lately. In this work, non-Hermiticity is used as a synthetic paramet…
Non-Hermitian Dirac Cones
Haoran Xue, Qiang Wang, Baile Zhang +1
Non-Hermitian systems, which contain gain or loss, commonly host exceptional point degeneracies rather than the diabolic points found in Hermitian systems. We present a class of no…
Realization of Photonic Charge-2 Dirac Point by Engineering Super-modes in Topological Superlattices
Mengying Hu, Kun Ding, Tong Qiao +4
Quite recently a novel variety of unconventional fourfold linear band degeneracy points has been discovered in certain condensed-matter systems. Contrary to the standard 3-D Dirac…
Observation of an acoustic octupole topological insulator
Haoran Xue, Yong Ge, Hong-Xiang Sun +6
The Berry phase associated with energy bands in crystals can lead to quantized quantities, such as the quantization of electric dipole polarization in an insulator, known as a one-…
Controlling Thermal Emission by Parity-symmetric Fano Resonance of Optical Absorbers in Metasurfaces
Xia Zhang, Zhen-guo Zhang, Qiang Wang +2
In this study, we designed a metasurface based on Al/SiN/Al nano-sandwich optical absorbers. Parity-symmetric dark magnetic resonance modes, anti-symmetric bright magnetic resonanc…
Effective Spin-2 Quasi-particles at Linear Dispersive Five-fold Degenerate Points with Tunable Topological Chern Numbers
Cheng Feng, Qiang Wang, S. N. Zhu +1
In this work, which is based on spin-2 vectors and traceless spin-2 tensors, an effective Hamiltonian is constructed with a linearly dispersive five-fold degenerate point with spin…
Entanglement in a second order topological insulator on a square lattice
Qiang Wang, Da Wang, Qiang-Hua Wang
In a -dimensional topological insulator of order , there are zero energy states on its corners which have close relationship with its entanglement behaviors. We studied the b…
Optical interface states protected by synthetic Weyl points
Qiang Wang, Meng Xiao, Hui Liu +2
Weyl fermions have not been found in nature as elementary particles, but they emerge as nodal points in the band structure of electronic and classical wave crystals. Novel phenomen…