A5038491567- Topological Materials and Phenomena
- Quantum Mechanics and Non-Hermitian Physics
- Metamaterials and Metasurfaces Applications
- Photonic Crystals and Applications
- Mechanical and Optical Resonators
- Advanced Electron Microscopy Techniques and Applications
- Photonic and Optical Devices
- Near-Field Optical Microscopy
- Advanced Antenna and Metasurface Technologies
- Nonlinear Photonic Systems
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Neural Networks and Reservoir Computing
- Wireless Power Transfer Systems
- Antenna Design and Analysis
- Energy Harvesting in Wireless Networks
- Advanced Fiber Laser Technologies
- Electron and X-Ray Spectroscopy Techniques
- Advanced Fluorescence Microscopy Techniques
- 2D Materials and Applications
- Strong Light-Matter Interactions
- Quantum and electron transport phenomena
- Graphene research and applications
- Advanced X-ray Imaging Techniques
- Quantum many-body systems
Zhejiang University
2014-2025
Technion – Israel Institute of Technology
2023-2025
Shaoxing University
2023
Jinhua Academy of Agricultural Sciences
2023
State Key Laboratory of Modern Optical Instruments
2021-2022
Zhejiang University of Science and Technology
2021
Zhejiang University-University of Edinburgh Institute
2021
Chinese Academy of Sciences
2018
Czech Academy of Sciences, Institute of Physics
2018
National Laboratory for Superconductivity
2018
Weyl points are the crossings of linearly dispersing energy bands three-dimensional crystals, providing opportunity to explore a variety intriguing phenomena such as topologically protected surface states and chiral anomalies. However, lack an ideal system in which all exist at same separated from any other poses serious limitation further development physics potential applications. By experimentally characterizing microwave photonic crystal saddle-shaped metallic coils, we observed that...
Despite great interest in the quantum anomalous Hall phase and its analogs, all experimental studies electronic bosonic systems have been limited to a Chern number of one. Here, we perform microwave transmission measurements bulk at edge ferrimagnetic photonic crystals. Band gaps with large numbers 2, 3, 4 are present results, which show excellent agreement theory. We measure mode profiles Fourier transform them produce dispersion relations modes, whose direction match our calculations.
The recently discovered non-Hermitian skin effect (NHSE) manifests the breakdown of current classification topological phases in energy-nonconservative systems, and necessitates introduction band topology. So far, all NHSE observations are based on one type topology, which complex energy spectrum winds along a closed loop. As characterized synthetic dimension photonic platform, topology can exhibit almost arbitrary windings momentum space, but their actual phenomena real physical systems...
Photonic topological valley kink states have become a significant research frontier with plethora of applications. Unlike the guided modes adjustable widths in conventional waveguides, are usually highly confined around domain walls. They thus lack mode width degree freedom (DOF), posing serious limitation to potential device Here, by adding photonic crystal (PhC) featuring Dirac points between two PhCs opposite valley-Chern numbers, we design and experimentally demonstrate valley-locked...
The emerging field of free-electron quantum optics enables electron-photon entanglement and holds the potential for generating nontrivial photon states information processing. Although recent experimental studies have entered regime, rapid theoretical developments predict that qualitatively unique phenomena only emerge beyond a certain interaction strength. It is thus pertinent to identify maximal strength materials, geometries, particle energies enable one approach it. We derive an upper...
The hypothetical Weyl particles in high-energy physics have been discovered three-dimensional crystals as collective quasiparticle excitations near two-fold degenerate points. Such momentum-space carry quantised chiral charges, which can be measured by counting the number of Fermi arcs emanating from corresponding It is known that merging unit-charged create new ones with more charges. However, only very recently has it realised there an upper limit - maximal charge a point host four...
Non-Hermitian skin effect denotes the exponential localization of a large number eigen-states in non-Hermitian lattice under open boundary conditions. Such non-Hermiticity-induced can offset penetration depth in-gap edge states, leading to counterintuitive delocalized modes, which have not been studied realistic photonic system such as crystals. Here, we analytically reveal and states Maxwell's equations for chiral crystals with anomalous parity-time symmetry. Remarkably, rigorously prove...
Abstract Exploiting topological ideas has been a major theme in modern photonics, which provides unprecedented opportunities to design photonic devices with robustness against defects. While most previous works photonics have focused on band theory, recent theories extend the concepts analysis of scattering matrices and suggest route complete polarization conversion (CPC). Here, experimental observation CPC is reported. Using angle‐resolved reflection measurements, it unveiled experimentally...
An ideal transformation-based omnidirectional cloak always relies on metamaterials with extreme parameters, which were previously thought to be too difficult realize. For such a reason, in previous experimental proposals of invisibility cloaks, the parameters requirements are usually abandoned, leading inherent scattering. Here, we report first demonstration an that satisfies requirement, can hide objects homogenous background. Instead using resonant involve unavoidable absorptive loss,...
Abstract The recently discovered non-Hermitian skin effect (NHSE) manifests the breakdown of current classification topological phases in energy-nonconservative systems, and necessitates introduction band topology. So far, all NHSE observations are based on one type topology, which complex energy spectrum winds along a closed loop. As characterized synthetic dimension photonic platform, topology can exhibit almost arbitrary windings momentum space, but their actual phenomena real physical...
The emerging field of free-electron quantum optics enables electron-photon entanglement and holds the potential for generating nontrivial photon states information processing. Although recent experimental studies have entered regime, rapid theoretical developments predict that qualitatively unique phenomena only emerge beyond a certain interaction strength. It is thus pertinent to identify maximal strength materials, geometries, particle energies enable one approach it. We derive an upper...
Unconventional Weyl points with topological charges higher than 1 can transform into various complex unconventional exceptional contours under non-Hermitian perturbations. However, theoretical studies of these have been limited to tight-binding models. Here, we propose realize in photonic continua—non-Hermitian anisotropic chiral plasma, based on ab initio calculation by Maxwell’s equations. By perturbing in-plane permittivity, an point a quadratic ring, type I chain one point, II two...
Abstract Topological valley photonics has emerged as a new frontier in with many promising applications. Previous boundary transport relies on kink states at internal boundaries between two topologically distinct domains. However, recent studies have revealed novel class of topological chiral edge (CESs) external materials, which remained elusive photonics. Here, CESs are proposed and experimentally demonstrated photonic metamaterials (VPMMs) by accurately tuning on‐site potentials....
Achieving broadband angular selectivity has been attracting much interest from both scientists and engineers in recent years. Previous experimental demonstrations have limited to the <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$p$ </tex-math></inline-formula> -polarized incidence. Here, we propose a universal approach achieve polarization-independent by introducing electrically magnetically anisotropic...
We present free-electron imaging of sub-cycle spatio-temporal dynamics 2D polariton wavepackets, demonstrating the first simultaneous time-, space-, and phase-resolved measurement such phenomena, resolving their novel features like vortex-anti-vortex singularities for record-low intensities.
Free–electron quantum optics facilitates electron-photon entanglement for information processing. The challenge is finding specialized photonic-structures optimizing interactions. We present a first-principle upper limit on the interaction strength, guiding design of future structures.
We experimentally demonstrate the generation of chiral electron beams in an ultrafast transmission microscope without necessity for light or chiral-shaping structures, but by breaking mirror symmetry light-electron interaction.
Inspired from the thoughts of forward-design cloaking techniques, invisibility cloaks with inverse designs have experience a period remarkably fast development in past few years. In this paper, we report an design method based on Mie scattering theory adoption genetic algorithm. With design, invisible dipole antenna is demonstrated experimentally and omnidirectional spherical cloak proposed.
We propose a surface-plasmon-inspired circuital-metamaterial cavity that achieves record-breaking interaction strength between charged-particles and photons. The drives emission of multiple microwave photons per particle, enabling strong particle-photon entanglement for applications in free-particles quantum optics.
Accessing the low-energy non-equilibrium dynamics of materials and their polaritons with simultaneous high spatial temporal resolution has been a bold frontier electron microscopy in recent years. One main challenges lies ability to retrieve extremely weak signals while simultaneously disentangling amplitude phase information. Here, we present Free-Electron Ramsey Imaging (FERI), approach based on light-induced modulation that enables coherent amplification optical near-fields imaging. We...