Jian Zi
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View article: Neural network inspired backpropagation algorithm for nanophotonic optimization
Neural network inspired backpropagation algorithm for nanophotonic optimization Open
View article: Vectorial microlasers with designable topological charges based on Möbius-like correspondence in quasi-BICs
Vectorial microlasers with designable topological charges based on Möbius-like correspondence in quasi-BICs Open
The ability to control topological properties of laser emission represents a fundamental advancement in photonic technology. Achieving topological laser in a single compact photonic structure is crucial for device integration and miniaturi…
View article: Meron Spin Textures in Momentum Space Spawning from Bound States in the Continuum
Meron Spin Textures in Momentum Space Spawning from Bound States in the Continuum Open
Topological spin textures, such as merons and skyrmions, have shown significance in both fundamental science and practical applications across diverse physical systems. The optical skyrmionic textures in real space have been extensively ex…
View article: Real-Time Tunnel Risk Forecasting Based on Rock Drill Signals During Construction
Real-Time Tunnel Risk Forecasting Based on Rock Drill Signals During Construction Open
View article: A Novel Gpgpu-Parallelized Contact Detection Algorithm for 3d-Fdem: Optimizing the Computational Structure
A Novel Gpgpu-Parallelized Contact Detection Algorithm for 3d-Fdem: Optimizing the Computational Structure Open
View article: Topological Singularities in Metasurface Scattering Matrices: From Nodal Lines to Exceptional Lines
Topological Singularities in Metasurface Scattering Matrices: From Nodal Lines to Exceptional Lines Open
Topological properties of photonic structures described by Hamiltonian matrices have been extensively studied in recent years. Photonic systems are often open systems, and their coupling with the environment is characterized by scattering …
View article: Optical moiré bound states in the continuum
Optical moiré bound states in the continuum Open
Trapping electromagnetic waves within the radiation continuum holds significant implications in the field of optical science and technology. Photonic bound states in the continuum (BICs) present a distinctive approach for achieving this fu…
View article: Inherent spin-orbit locking in topological bound state in the continuum lasing
Inherent spin-orbit locking in topological bound state in the continuum lasing Open
Bound states in the continuum (BICs) are exotic optical topological singularities that defy the typical radiation within the continuum of radiative modes and carry topological polarization vortices in momentum space. Enabling ultrahigh qua…
View article: Spin-Orbit-Locking Chiral Bound States in the Continuum
Spin-Orbit-Locking Chiral Bound States in the Continuum Open
Bound states in the continuum (BICs), which are confined optical modes exhibiting infinite quality factors and carrying topological polarization configurations in momentum space, have recently sparked significant interest across both funda…
View article: Topological water-wave structures manipulating particles
Topological water-wave structures manipulating particles Open
Topological wave structures, such as vortices and skyrmions, appear in a variety of quantum and classical wave fields, including optics and acoustics. In particular, optical vortices have found numerous applications ranging from quantum in…
View article: Exploiting Topological Darkness in Photonic Crystal Slabs for Spatiotemporal Vortex Generation
Exploiting Topological Darkness in Photonic Crystal Slabs for Spatiotemporal Vortex Generation Open
Spatiotemporal optical vortices (STOVs) with swirling phase singularities in space and time hold great promise for a wide range of applications across diverse fields. However, current approaches to generate STOVs lack integrability and rel…
View article: Optical bound states in the continuum in periodic structures: mechanisms, effects, and applications
Optical bound states in the continuum in periodic structures: mechanisms, effects, and applications Open
View article: Imaging with an Ultrathin Reciprocal Lens
Imaging with an Ultrathin Reciprocal Lens Open
Imaging is of great importance in everyday life and various fields of science and technology. Conventional imaging is achieved by bending light rays originating from an object with a lens. Such ray bending requires space-variant structures…
View article: Generation of Spatiotemporal Vortex Pulses by Simple Diffractive Grating
Generation of Spatiotemporal Vortex Pulses by Simple Diffractive Grating Open
Spatiotemporal vortex pulses are wave packets that carry transverse orbital angular momentum, exhibiting exotic structured wavefronts that can twist through space and time. Existing methods to generate these pulses require complex setups l…
View article: General bound states in the continuum in momentum space
General bound states in the continuum in momentum space Open
Polarization singularities including bound states in the continuum (BICs) and circularly polarized states have provided promising opportunities in the manipulation of light waves. Previous studies show that BICs in photonic crystal slabs a…
View article: Imaging with an ultra-thin reciprocal lens
Imaging with an ultra-thin reciprocal lens Open
Imaging is of great importance in everyday life and various fields of science and technology. Conventional imaging is achieved by bending light rays originating from an object with a lens. Such ray bending requires space-variant structures…
View article: Global phase diagram of bound states in the continuum
Global phase diagram of bound states in the continuum Open
Bound states in the continuum (BICs) in photonic-crystal slabs have been conventionally classified into three types: single-resonance parametric, symmetry-protected, and Friedrich–Wintgen BICs. Here, we show that the single-resonance param…
View article: High-efficiency nonlocal reflection-type vortex beam generation based on bound states in the continuum
High-efficiency nonlocal reflection-type vortex beam generation based on bound states in the continuum Open
Momentum-space polarization vortices centered at symmetry-protected bound states in the continuum of a periodic structure, e.g. photonic crystal slab, provide a novel nonlocal approach to generate vortex beams. This approach enjoys a great…
View article: Full description of dipole orientation in organic light-emitting diodes
Full description of dipole orientation in organic light-emitting diodes Open
Considerable progress has been made in organic light-emitting diodes (OLEDs) to achieve high external quantum efficiency, among which dipole orientation has a remarkable effect. In most cases, the radiation of the dipoles in OLEDs is theor…
View article: Momentum-space polarization fields in two-dimensional photonic-crystal slabs: Physics and applications
Momentum-space polarization fields in two-dimensional photonic-crystal slabs: Physics and applications Open
In addition to non-radiative guided modes, two-dimensional photonic-crystal slabs support guided resonant ones which can radiate into free space. From the polarization states of these guided resonances, a polarization field on a photonic b…
View article: Realization of ultrawide-angle high transmission and its applications in 5G millimeter-wave communications
Realization of ultrawide-angle high transmission and its applications in 5G millimeter-wave communications Open
By using single-layer metasurfaces, we realized ultrawide-angle high-transmission in the millimeter-wave band, which allowed more than 98% transmission of dual-polarized electromagnetic waves for almost all incident angles. The multipolar …
View article: Bound states in the continuum based on the total internal reflection of Bloch waves
Bound states in the continuum based on the total internal reflection of Bloch waves Open
A photonic-crystal slab can support bound states in the continuum (BICs) that have infinite lifetimes but are embedded into the continuous spectrum of optical modes in free space. The formation of BICs requires a total internal reflection …
View article: Giant magneto field effect in up-conversion amplified spontaneous emission via spatially extended states in organic-inorganic hybrid perovskites
Giant magneto field effect in up-conversion amplified spontaneous emission via spatially extended states in organic-inorganic hybrid perovskites Open
Up-conversion lasing actions are normally difficult to realize in light-emitting materials due to small multi-photon absorption cross section and fast dephasing of excited states during multi-photon excitation. This paper reports an easily…
View article: Shifting beams at normal incidence via controlling momentum-space geometric phases
Shifting beams at normal incidence via controlling momentum-space geometric phases Open
When hitting interfaces between two different media, light beams may undergo small shifts. Such beam shifts cannot be described by the geometrical optics based on Snell’s law and their underlying physics has attracted much attention. Conve…
View article: Ways to achieve efficient non-local vortex beam generation
Ways to achieve efficient non-local vortex beam generation Open
Based on the insights into the phenomenon of bound states in the continuum, a novel approach utilizing the momentum-space polarization morphologies of periodic structures to generate vortex beams (VBs) has been proposed. Such periodic stru…
View article: Correction: Photonic-dispersion neural networks for inverse scattering problems
Correction: Photonic-dispersion neural networks for inverse scattering problems Open
After publication of this article 1 , it is noticed this article contained an error.In Results section, the equation 'C ¼ jΣ jRd-Rgj2' in the sentence below should be corrected to 'C ¼ ΣjRd-Rgj 2' .The difference between the generated resp…
View article: Controlling fluctuations in small structures: Hidden information in the noise
Controlling fluctuations in small structures: Hidden information in the noise Open
The exploration of the rich dynamics of electrons is a frontier in\nfundamental nano-physics. The dynamical behavior of electrons is dominated by\nrandom and chaotic thermal motion with ultrafast ($\\approx$ ps) and nanoscale\nscatterings.…
View article: Photonic-dispersion neural networks for inverse scattering problems
Photonic-dispersion neural networks for inverse scattering problems Open
Inferring the properties of a scattering objective by analyzing the optical far-field responses within the framework of inverse problems is of great practical significance. However, it still faces major challenges when the parameter range …
View article: Phase characterisation of metalenses
Phase characterisation of metalenses Open
Metalenses have emerged as a new optical element or system in recent years, showing superior performance and abundant applications. However, the phase distribution of a metalens has not been measured directly up to now, hindering further q…
View article: Thin-film neural networks for optical inverse problem
Thin-film neural networks for optical inverse problem Open
The thin-film optical inverse problem has attracted a great deal of attention in science and industry, and is widely applied to optical coatings. However, as the number of layers increases, the time it takes to extract the parameters of th…