A5068381230- Plasmonic and Surface Plasmon Research
- Photonic Crystals and Applications
- Photonic and Optical Devices
- Metamaterials and Metasurfaces Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Orbital Angular Momentum in Optics
- Optical Coatings and Gratings
- Advanced Antenna and Metasurface Technologies
- Quantum Dots Synthesis And Properties
- Topological Materials and Phenomena
- Photorefractive and Nonlinear Optics
- Silicon Nanostructures and Photoluminescence
- Advanced Fiber Laser Technologies
- Nonlinear Optical Materials Studies
- Hydrocarbon exploration and reservoir analysis
- Advanced Data Storage Technologies
- Digital and Cyber Forensics
- Hydraulic Fracturing and Reservoir Analysis
- Material Properties and Processing
- Theoretical and Computational Physics
- Drilling and Well Engineering
- Copper-based nanomaterials and applications
- Seismic Imaging and Inversion Techniques
- Advanced Fiber Optic Sensors
- Nonlinear Photonic Systems
Nanjing University
2016-2025
Collaborative Innovation Center of Advanced Microstructures
2012-2024
University of Electronic Science and Technology of China
2010-2024
Zhejiang University
1998-2023
China University of Petroleum, Beijing
2010-2023
Research Institute of Petroleum Exploration and Development
2018-2022
Michigan Technological University
2011-2021
University of Michigan–Ann Arbor
2020
National Laboratory of Solid State Microstructures
2004-2017
Harbin Institute of Technology
2017
The studies of topological phases matter have been developed from condensed physics to photonic systems, resulting in fascinating designs robust devices. Recently, higher-order insulators investigated as a novel phase beyond the conventional bulk-boundary correspondence. Previous mainly focused on multipole systems with negative coupling between lattice sites. Here we experimentally demonstrate that second-order insulating without can be realized two-dimensional dielectric crystals. We...
Metalens-array–based quantum source Spontaneous down-conversion is an exotic optical process in a nonlinear crystal which high-energy photon splits into two lower-energy photons that are mechanically entangled. These entangled pairs valuable commodities for information processing and communications. Because the experimental setup usually performed with bulk components, there need to decrease size scale application. Li et al. combined array of specialized metalenses show can be shrunk...
Early processing of visual information takes place in the human retina. Mimicking neurobiological structures and functionalities retina provides a promising pathway to achieving vision sensor with highly efficient image processing. Here, we demonstrate prototype that operates via gate-tunable positive negative photoresponses van der Waals (vdW) vertical heterostructures. The emulates not only bipolar cells photoreceptors but also unique connectivity between photoreceptors. By tuning gate...
Abstract The quantum spin Hall effect lays the foundation for topologically protected manipulation of waves, but is restricted to one-dimensional-lower boundaries systems and hence limits diversity integration topological photonic devices. Recently, conventional bulk-boundary correspondence band topology has been extended higher-order cases that enable explorations states with codimensions larger than one such as hinge corner states. Here, we demonstrate a in two-dimensional crystal. Owing...
Ideal imaging, which is constantly pursued, requires the collection of all kinds optical information objects in view, such as three-dimensional spatial (3D) including planar distribution and depth, colors, i.e., spectral (1D). Although imaging have individually evolved rapidly, their straightforward combination a cumbersome system, severely hindering practical applications four-dimensional (4D) imaging. Here, we demonstrate ultra-compact light-field (SLIM) by using transversely dispersive...
The three primary colour model, i.e., red, green, and blue based on the perception of human eye, has been widely used in imaging. most common approach for obtaining information is to use a Bayer filter, which filters light with four pixels an imaging sensor form effective pixel. However, its energy utilization efficiency collection are limited low level due three-channel filtering nature. Here, by employing inverse-design method, we demonstrate pixel-level metasurface-based Bayer-type router...
Abstract Recently, metasurfaces have arisen as next‐generation optics with various merits, such being ultrathin and lightweight multi‐function integration. Numerous applications of been demonstrated up to now, including wavefront shaping, optical imaging, hologram display, structured light generation, polarization detection, so on. Among them, imaging components techniques substantially promoted the advent due their superior spatial modulation properties over electromagnetic waves. Here,...
We have demonstrated that by coating with a thin dielectric layer of tetrahedral amorphous carbon (ta-C), biocompatible and optical transparent material in the visible range, Ag nanoparticle-based substrate becomes extremely suitable for surface-enhanced Raman spectroscopy (SERS). Our measurements show 10 Å or thicker ta-C efficient to protect oxygen-free air prevent ionizing aqueous solutions. Furthermore, nanoparticles coated film shows higher enhancement signals than uncoated substrate....
Abstract Plasmonic hot-electron generation has recently come into focus as a new scheme for solar energy conversion. So far, however, due to the relatively narrow bandwidth of surface plasmon resonances and insufficient resonant light absorption, most plasmonic photocatalysts show narrow-band spectral responsivities small conversion efficiencies. Here we experimentally demonstrate that three-layered nanostructure, consisting monolayer gold-nanoparticles gold film separated by TiO 2 gap layer...
Photonics is currently undergoing an era of miniaturization thanks in part to two-dimensional (2D) optical metasurfaces. Their ability sculpt and redirect momentum can give rise force, which acts orthogonally the direction light propagation. Powered by a single unfocused beam, these lateral forces (LOFs) be used drive advanced metavehicles are controlled via incident beam's polarization. However, full control metavehicle on 2D plane (i.e. forward, backward, left, right) with sign-switchable...
We study theoretically the optical properties of a three-dimensional self-assembly spherical-metal nanoparticles. Our band-structure calculations show that photonic band gaps in near infrared and frequencies can be realized fcc lattice metal particles with radii approximately 160 nm. When absorption is taken into account, we found gap preserved good metals like silver. The nanoparticles replaced by dielectric spheres coated layer metal.
A highly stretchable plasmonic structure composed of a monolayer array metal-capped colloidal spheres on an elastomeric substrate has been fabricated using simple and inexpensive self-assembly transfer-printing techniques. This composite supports coupled surface plasmons whose wavelengths are sensitive to the arrangement spheres. Upon stretching, lattice will be deformed, leading large wavelength shift plasmon resonances simultaneously obvious color change. offers promising approach tune...
Abstract Efficient control of optical radiation at subwavelength scales plays important roles for various applications. Dielectric nanoparticles or dielectric shells with a large refractive index n ~ 3–4, which are only achievable limited semiconductors, involved in most designs so far to the scattering by overlapping electric and magnetic dipolar modes same magnitude. Here we propose new mechanism based on interplay between quadrupolar resonances different amplitudes, both electric,...
Abstract Light beams carrying orbital angular momentum (OAM) in the form of optical vortices have attracted great interest due to their capability for providing a new dimension and approach manipulate light–matter interactions. Recently, plasmonics has offered efficient ways focus vortex beyond diffraction limit. However, unlike visible near‐infrared regime, it is still big challenge realize plasmonic at far‐infrared even longer wavelengths. An effective strategy create deep‐subwavelength...
Topological gapped crystalline materials are a class of topological characterized by invariants protected spatial symmetries, allowing for the emergence robust boundary states. The band topology with crystal symmetries can be theoretically labeled symmetry-indicator invariants, such as Fu-Kane parity criterion inversion-symmetric materials. Here, we propose an approach to measuring these and diagnosing materials, which is experimentally validated in two-dimensional photonic crystals finite...
Novel Au-induced polyvinylpyrrolidone (PVP) aggregates with bound water (PVP-water) were created for the highly shape-selective synthesis of distinctive silica nanostructures, such as core-shell spheres, rods, snakes, tubes, capsules, thornlike, and dendritic morphologies. A water/PVP/n-pentanol system was first designed to bind PVP, then Au nanoparticles used induce PVP-water species aggregate into soft structures by exploiting interplay between PVP gold. This confirmed IR absorption...
A strong and dynamically controlled circular dichroism (CD) effect has aroused great attention due to its desirable applications in modern chemistry life sciences. In this Letter, we propose a graphene-metal hybrid chiral metamaterial generate mid-infrared CD with an intensity of more than 10%, which can be actively over wide wavelength range. addition the tunability, signal our nanostructure is drastically larger that purely graphene-based chiroptical nanostructures. Our design offers new...
Recently, techniques involving random patterns have made it possible to control the light trapping of microstructures over broad spectral and angular ranges, which provides a powerful approach for photon management in energy efficiency technologies. Here, we demonstrate simple method create wideband near-unity absorber by introducing dense pattern metal-capped monodispersed dielectric microspheres onto an opaque metal film; works due excitation multiple optical plasmonic resonant modes. To...