A5100777056- Plasmonic and Surface Plasmon Research
- Metamaterials and Metasurfaces Applications
- Orbital Angular Momentum in Optics
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Advanced Fiber Laser Technologies
- Computational Fluid Dynamics and Aerodynamics
- Fluid Dynamics and Turbulent Flows
- Gold and Silver Nanoparticles Synthesis and Applications
- Quantum Mechanics and Non-Hermitian Physics
- Photonic Crystal and Fiber Optics
- Advanced Fiber Optic Sensors
- Topological Materials and Phenomena
- Near-Field Optical Microscopy
- Advanced Antenna and Metasurface Technologies
- Mechanical and Optical Resonators
- Optical Polarization and Ellipsometry
- Electromagnetic Scattering and Analysis
- Laser-Matter Interactions and Applications
- Nonlinear Photonic Systems
- Advanced Numerical Methods in Computational Mathematics
- Atomic and Subatomic Physics Research
- Fluid Dynamics and Vibration Analysis
- Random lasers and scattering media
- Optical Coatings and Gratings
National University of Defense Technology
2016-2025
Huazhong University of Science and Technology
2022
State Key Laboratory of Nuclear Physics and Technology
2020
University of Science and Technology of China
2014-2020
Peking University
2015-2020
Arizona State University
2019
Universität Hamburg
2016-2018
Center for Free-Electron Laser Science
2016-2018
Australian National University
2009-2016
Deutsches Elektronen-Synchrotron DESY
2016
Core–shell nanoparticles have attracted surging interests due to their flexibly tunable resonances and various applications in medical diagnostics, biosensing, nanolasers, many other fields. The core–shell can support simultaneously both electric magnetic resonances, when the are properly engineered, entirely new properties be achieved. Here we study that artificial dipolar modes, which engineered coincide spectrally with same strength. We reveal interferences of these two result azimuthally...
The original Kerker effect was introduced for a hypothetical magnetic sphere, and initially it did not attract much attention due to lack of materials required. Rejuvenated by the recent explosive development field metamaterials especially its core concept optically-induced artificial magnetism, has gained an unprecedented impetus rapidly pervaded different branches nanophotonics. At same time, behind itself also been significantly expanded generalized. Here we review physics various...
We study the angular scattering properties of individual core-shell nanoparticles that support simultaneously both electric and optically-induced magnetic resonances different orders.In contrast to approach suppress backward enhance forward relying on overlapping dipoles, we reveal directionality can be further improved through interferences higher order modes.Since major contributing responses tuned close magnitudes, ultra-directional achieved by single without compromising feature...
Graphene plasmonics shows potential for light trapping in mid-infrared and THz photodetectors with high efficiency tunable spectral selectivity.
We demonstrate, both theoretically and numerically, the efficient manipulation of plasmonic Airy beams in linear optical potentials produced by a wedged metal-dielectric-metal structure. By varying angle between metallic plates, we can accelerate, compensate, or reverse self-deflection without compromising self-healing properties. also show that plasmons different wavelengths could be routed into directions, creating new opportunities for steering manipulation.
We propose generalized magnetic mirrors that can be achieved by excitations of sole electric resonances. Conventional approaches to obtain rely heavily on exciting the fundamental dipoles, whereas here we reveal that, besides resonances, resonances higher orders also employed highly efficient mirrors. Based electromagnetic duality, it is shown provide direct demonstrations proposed in a simple system one-dimensional periodic array all-dielectric wires, which may shed new light many advanced...
Thanks to the unique properties such as spatially coherent, broadband emission spectrum, and high temporal stability, superfluorescent fiber source (SFS) has shown tremendous potential in wide applications of sensing, imaging, spectroscopy, material processing. The fast development active pump diode provides unprecedented opportunity for performance scaling SFS. In this paper, new horizon opened by recently developed SFS will be reviewed. First, output power with different architectures...
By studying the scattering of normally incident plane waves by a single nanowire, we reveal indispensable role toroidal multipole excitation in expansions radiating sources. It is found that for both p-polarized and s-polarized waves, dipoles can be effectively excited within homogenous dielectric nanowires optical spectrum regime. We further demonstrate plasmonic core–shell rendered invisible through destructive interference electric dipoles, which may inspire many nanowire-based...
We investigate the scattering properties of spherical nanoparticles by employing a Cartesian multipole expansion method which has incorporated radiating toroidal multipoles. It is shown that dipoles, are negligible under long-wavelength approximations, can be excited within high-permittivity dielectric and significantly influence profile in optical regime. further reveal transparencies core-shell plasmonic classified into two categories: i) trivial transparency with no effective excitations...
Chiral optical effects are generally quantified along some specific incident directions of exciting waves (especially for extrinsic chiralities achiral structures) or defined as direction-independent properties by averaging the responses among all structure orientations. Though great significance various applications, chirality extremization (maximized minimized) with respect to orientations have not been explored, especially in a systematic manner. In this study we examine chiral open...
Strong subwavelength field enhancement has often been assumed to be unique plasmonic nanostructures. Here we propose a type of all-dielectric metamaterials based on split bar resonators. The nano gap at the centre resonant elements results in large local and light localization surrounding medium, which can employed for strong light-matter interactions. In Fano-resonant dielectric metamaterial comprising pairs asymmetric silicon bars, electric amplitude exceeds 120 while averaged...
We study optical wave manipulations through high-index dielectric metalattices in both diffractionless metasurface and diffractive metagrating regimes. It is shown that the collective lattice couplings can be employed to tune excitation efficiencies of all electric magnetic multipoles various orders supported by each particle within metalattice. The interferences those adjusted lead highly asymmetric angular scattering patterns are totally different from isolated particles, which...
We study the scattering of normally incident waves by core-shell nanowires, which support both electric and magnetic resonances. Within such for p-polarized waves, each resonance corresponds to two degenerate channels while only one channel. Consequently, when dipole (ED) (MD) are tuned overlap spectrally, magnitude ED is twice that one, leading a pair angles vanishing scattering. further demonstrate features nanowires polarization dependent, also can be induced Fano resonances due...
Wavelength widely tunable femtosecond sources can be implemented by optically filtering the leftmost/rightmost spectral lobes of a broadened spectrum due to self-phase modulation (SPM) dominated fiber-optic nonlinearities. We numerically and experimentally investigate feasibility implementing such source inside optical fibers with negative group-velocity dispersion (GVD). show that broadening prior soliton fission is SPM generates well-isolated lobes; results in energetic pulses wavelength...
Since the first successful serial crystallography (SX) experiment at a synchrotron radiation source, popularity of this approach has continued to grow showing that third-generation synchrotrons can be viable alternatives scarce X-ray free-electron laser sources. Synchrotron flux may increased ∼100 times by moderate increase in bandwidth ('pink beam' conditions) some cost data analysis complexity. Here, we report high-viscosity injector-based pink-beam SX experiments. The structures...
We report the observation of polarization singularities in momentum space 2D photonic quasicrystal slabs. Supercell approximation and band-unfolding approach are applied to obtain approximate dispersions far-field states defined on them. discuss relations between topological charges vortex at $\mathrm{\ensuremath{\Gamma}}$ points symmetries With a perspective multipolar expansions for supercell, we confirm that protected by point-group symmetry slab. further uncover slab correspond...
Conventional approaches to control and shape the scattering patterns of light generated by different nanostructures are mostly based on engineering their electric response due fact that most metallic support only resonances in optical frequency range. Recently, fuelled fast development fields metamaterials plasmonics, artificial optically-induced magnetic responses have been demonstrated for various nanostructures. This kind can be employed provide an extra degree freedom efficient shaping...
We study the light scattering of homogenous radially-anisotropic spherical particles.It is shown that radial anisotropy can be employed to tune effectively electric resonances, and thus enable flexible overlapping magnetic dipoles various numbers, which leads unidirectional forward super-scattering at different spectral positions.We further reveal through adjusting parameters, resonances higher orders also made overlapped, collimating lobes.The ultra-directional we have obtained with...
Abstract The two‐mode coupling model, with energy splitting and formation of supermodes different life times, has been pervasive in almost every discipline physics. This fundamental model is revisited from a perspective multipolar expansions, hidden dimension it revealed, by establishing subtle connection between the two seemingly unrelated properties Q‐factors far‐field angular radiation patterns. It discovered that both regimes negative positive couplings, significant Q‐factor enhancement...
Abstract Simple superpositions of Laguerre–Gauss beams illustrate, counterintuitively, the difference between two quantities that are commonly conflated: component orbital angular momentum ⟨ l ⟩ in propagation direction z , and total topological charge S which is algebraic sum charges vortices piercing any plane perpendicular to . The examples illustrate contrasting situations: = 0, ≠ 0. In second situation, not only zero but also there no infinite half-space beyond beam waist
We study the scattering properties of arrays core-shell nanoparticles and reveal existence polarization-independent Fano resonances. Such resonances occur through interaction a pair degenerate orthogonal electric artificial magnetic modes same strength with spectrally narrow geometric resonance due to diffractive coupling in array. Furthermore, we show that for different polarizations incident plane waves, supported by each nanoparticle can be selectively controlled, providing extra freedom...
Fostered by the recent progress of fields plasmonics and metamaterials, seminal topic light scattering clusters nanoparticles is attracting enormous renewed interest gaining more attention than ever before. Related studies have not only found various new applications in different branches physics chemistry, but also spread rapidly into other such as biology medicine. Despite significant achievements, there still exists unsolved vitally important challenges how to obtain robust...
We demonstrate a high-power narrowband all-fiber superfluorescent fiber source employing three-stages master oscillator power-amplifier chain. Narrowband seed light is selected from broadband-amplified spontaneous-emission by spectrum filter combing with circulator and Bragg grating. In the main amplifier, maximal output power 1.87 kW an optical-to-optical conversion efficiency of 77.4% full width at half-maximum (FWHM) linewidth 1.7 nm. The corresponding fluctuation ±1.4% in 100 s...