A5100776215- Topological Materials and Phenomena
- Metamaterials and Metasurfaces Applications
- Mechanical and Optical Resonators
- Photonic and Optical Devices
- Advanced Antenna and Metasurface Technologies
- Orbital Angular Momentum in Optics
- Quantum Mechanics and Non-Hermitian Physics
- Silicon Carbide Semiconductor Technologies
- Antenna Design and Analysis
- Copper Interconnects and Reliability
- Particle Detector Development and Performance
- Cancer Cells and Metastasis
- Microwave and Dielectric Measurement Techniques
- Thin-Film Transistor Technologies
- Electromagnetic Fields and Biological Effects
- Mathematics and Applications
- Terahertz technology and applications
- Random lasers and scattering media
- Optics and Image Analysis
- Semiconductor materials and devices
- Plasmonic and Surface Plasmon Research
- Mormonism, Religion, and History
- Radio Wave Propagation Studies
- Nuclear Physics and Applications
- Data Visualization and Analytics
Tongji University
2024
Sichuan University
2023
State Key Laboratory of Biotherapy
2023
University of Shanghai for Science and Technology
2019-2022
Institute of High Energy Physics
2022
Chinese Academy of Sciences
2022
China Spallation Neutron Source
2022
Nanjing University of Science and Technology
2022
Data Storage Institute
2017-2018
Agency for Science, Technology and Research
2017-2018
Dynamic steering of laser beams by ultrathin optical metasurfaces is a significant research advance for possible applications in remote ranging and sensing. A unique platform such important functionalities offered dielectric that have the highest transmission efficiency. However, realization dynamically tunable still remains challenge. Here we experimentally demonstrate dynamic switching beam deflection silicon-nanodisk metasurface infiltrated with liquid crystals. In particular, show from...
Topological photonics was initially inspired by the quantum-optical analogy between Schr\"odinger equation for an electron wavefunction and paraxial a light beam. Here, we reveal unexpected phenomenon in topological pumping observed arrays of nonparaxial optical waveguides where becomes invalid. We predict theoretically demonstrate experimentally asymmetric when injected field transfers from one side waveguide array to other whereas reverse process is unexpectedly forbidden. Our finding...
Abstract Airy beams exhibit intriguing properties such as nonspreading, self-bending, and self-healing have attracted considerable recent interest because of their many potential applications in photonics, to beam focusing, light-sheet microscopy, biomedical imaging. However, previous approaches generate using photonic structures suffered from severe chromatic problems arising strong frequency dispersion the scatterers. Here, we design fabricate a metasurface composed silicon posts for range...
Circularly polarized light carries spin angular momentum, so it can exert an optical torque on the polarization-anisotropic particle by momentum transfer. Here, we show that giant positive and negative torques Mie-resonant (gain) particles arise from emergence of superhybrid modes with magnetic multipoles electric toroidal moments, excited linearly beams. Anomalous (doped judicious amount dye molecules) are over 800 200 times larger than ordinary lossy counterparts, respectively. Meanwhile,...
Abstract A minority carrier lifetime of 25.46 μs in a P-type 4H-SiC epilayer has been attained through sequential thermal oxidation and hydrogen annealing. Thermal can enhance the by reducing carbon vacancies. However, this process also generates clusters with limited diffusivity contributes to enlargement surface pits on 4H-SiC. High-temperature annealing effectively reduces stacking fault dislocation density. Moreover, electron spin resonance analysis indicates significant reduction...
Abstract The Su–Schrieffer–Heeger (SSH) model has been the subject of extensive experimental research in context topological photonics. Ideally, on‐site potential and hopping strength are sufficiently accurate for implementation photonic coupled waveguide arrays. Here, two localized edge modes, zero mode trivial Tamm mode, proposed demonstrated modified SSH using a microwave array. system used is composed an array evanescently ultrathin corrugated metallic “H‐bar” waveguides. Furthermore,...
Recent advances in non-Hermitian topological phases have exploited the unusual features photonics systems. In particular, coupling effect and parity–time (PT) symmetry been found to jointly determine transition of edge states, which yet be detected directly coupled PT-symmetric waveguides. this work, we use a finite waveguide array described by Su–Schrieffer–Heeger model explicitly reveal relation between states PT unveil condition for coexistence phases. Microwave-near-field experiments...
It is commonly believed that topologically nontrivial one-dimensional systems support edge states rather than bulk at zero energy. In this work, we find an unanticipated case of topological Anderson insulator (TAI) phase where two modes are degenerate energy, in addition to modes. We term ``ungapped TAI'' distinguish it from the previously known gapped TAIs. Our experimental realization both and ungapped TAIs relies on coupled photonic resonators, which disorder coupling judiciously...
Nonradiating current configurations attract attention of physicists for many years as possible models stable atoms in the field theories. One intriguing example such a nonradiating source is known anapole (which means without poles Greek), and it was originally proposed by Yakov Zeldovich nuclear physics. Recently, an suggested model elementary particles describing dark matter Universe. Classically, mode can be viewed composition electric toroidal dipole moments, resulting destructive...
Floquet topological insulators (FTIs) have been used to study the features of a dynamic quantum system within band structure. However, it is difficult directly observe modulation structures in FTIs. Here, we implement Su–Schrieffer–Heeger model periodically curved waveguides explore new behaviors FTIs using light field evolutions. Changing driving frequency produces near-field evolutions high-frequency waveguide array that are equivalent straight arrays. Furthermore, at modest frequencies,...
A minority carrier lifetime of 25.46 $\mu$s in a P-type 4H-SiC epilayer has been attained through sequential thermal oxidation and hydrogen annealing. Thermal can enhance the by reducing carbon vacancies. However, this process also generates clusters with limited diffusivity contributes to enlargement surface pits on 4H-SiC. High-temperature annealing effectively reduces stacking fault dislocation density. Moreover, electron spin resonance analysis indicates significant reduction vacancy...
In quantum mechanics, adiabatic elimination is a standard tool that produces low-lying reduced Hamiltonian for relevant subspace of states, incorporating effects its coupling to states with much higher energy. Suppose this powerful approach applied quasi-energy in periodically-driven systems, critical question then arises the violation condition caused by driven forces challenges such presence spectral reduction non-equilibrium system. Here, both theoretically and experimentally, we newly...
All-dielectric optical metasurfaces represent a new platform that is able to change electromagnetic field dramatically, while having thickness much smaller than the wavelength. The properties of metasurface depends critically on geometry its nanostructuring, therefore they are pre-set during fabrication process. However, number practical application such requires dynamic their with operation. Embedding in LC we can offer unique opportunities for tuning and control properties. Here show by...
Metasurfaces are planar arrangements of elements that designed to present a particular response an incident electromagnetic field. Due their ability control at will the phase, polarization and amplitude reflected and/or transmitted waves subwavelength scale they have gathered great deal attention among research community. Although first metasurface proposals were realized with plasmonic particles, focus is now turning into all-dielectric approaches, in order mitigate losses increase device...
Optically resonant dielectric nanostructures represent a new and rapidly developing research direction in nanophotonics [1]. They show plenty of useful functionalities can complement or even substitute plasmonic nanoparticles for many potential application directions. The main advantages over conventional plasmonics are low losses, wide range applicable materials strong magnetic response. In particular, the last feature opens broad opportunities to control light scattering, transmission,...