Keya Zhou
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View article: All-dielectric meta-waveguides for on-chip integration
All-dielectric meta-waveguides for on-chip integration Open
Meta-waveguides have demonstrated unprecedented capabilities for controlling guided waves in both free space and on-chip. However, the designs for on-chip guided waves control are still insufficient, with only a few functions being propose…
View article: All-dielectric meta-waveguides for on-chip integration
All-dielectric meta-waveguides for on-chip integration Open
Meta-waveguides have demonstrated unprecedented capabilities for controlling guided waves in both free space and on-chip. However, the designs for on-chip guided wave control are still insufficient, with only a few functions being proposed…
View article: All-dielectric metasurfaces for intensity-controllable beam splitting and polarization conversion
All-dielectric metasurfaces for intensity-controllable beam splitting and polarization conversion Open
Beam splitters and polarization converters of electromagnetic waves based on metasurfaces have been extensively studied. However, there are few reports on the ability to arbitrarily control the intensity ratio between different diffraction…
View article: Generation of dynamic rotation propagation vortex beam by a Fibonacci series annular subzone vortex phase
Generation of dynamic rotation propagation vortex beam by a Fibonacci series annular subzone vortex phase Open
Recently, the optical vortex (OV) has gained increasing interest since the potential for applications of the orbital angular momentum (OAM) carried by optical vortex beams. However, generation is currently limited single static circular in…
View article: Fano resonance in a microring resonator with a micro-reflective unit
Fano resonance in a microring resonator with a micro-reflective unit Open
Fano resonance is considered to be a promising approach for integrated sensing. However, achieving and controlling Fano resonance lineshapes on ultra-compact chips remains a challenge. In this article, we propose a theoretic model based on…
View article: High‐Performance and Lithography‐Free Au/WS<sub>2</sub>/Ag Vertical Schottky Junction Solar Cells
High‐Performance and Lithography‐Free Au/WS<sub>2</sub>/Ag Vertical Schottky Junction Solar Cells Open
Due to their extraordinarily large optical absorption coefficients, transition metal dichalcogenides (TMDs) are gaining more and more attention for photovoltaic applications. Improving the device performance of a TMD solar cell requires an…
View article: Multiwavelength high-order optical vortex detection and demultiplexing coding using a metasurface
Multiwavelength high-order optical vortex detection and demultiplexing coding using a metasurface Open
Orbital angular momentum (OAM) of an optical vortex has attracted great interest from the scientific community due to its significant values in high-capacity optical communications such as mode or wavelength division multiplexer/demultiple…
View article: Topological phase transitions and Weyl semimetal phases in chiral photonic metamaterials
Topological phase transitions and Weyl semimetal phases in chiral photonic metamaterials Open
Recently, topologically nontrivial phases in chiral metamaterials have been proposed. However, a comprehensive description of topological phase diagrams and transitions in chiral metamaterials has not been presented. In this work, we demon…
View article: Channeled imaging spectropolarimeter reconstruction by neural networks
Channeled imaging spectropolarimeter reconstruction by neural networks Open
Snapshot channeled imaging spectropolarimetry (SCISP), which can achieve spectral and polarization imaging without scanning (a single exposure), is a promising optical technique. As Fourier transform is used to reconstruct information, SCI…
View article: Chiral and multiple one-way surface states on photonic gyroelectric metamaterials with small Chern number
Chiral and multiple one-way surface states on photonic gyroelectric metamaterials with small Chern number Open
Topological one-way surface states allow light to pass through sharp corners without reflection. In order to enhance the capability of surface routing devices, multiple one-way surface modes are usually required. Different from previously …
View article: Second harmonic generation enhancement and directional emission from topological corner state based on the quantum spin Hall effect
Second harmonic generation enhancement and directional emission from topological corner state based on the quantum spin Hall effect Open
Topological corner state has attracted much research interests since it does not obey the conventional bulk-edge correspondence and enables tightly confined light within small volumes. In this work, we demonstrate an enhanced second harmon…
View article: Second Harmonic Generation Enhancement From Plasmonic Toroidal Resonance in Core-Shell Nanodisk
Second Harmonic Generation Enhancement From Plasmonic Toroidal Resonance in Core-Shell Nanodisk Open
Toroidal multipoles, together with electric and magnetic multipoles, provide a complete description of electromagnetic responses of matter. The fundamental toroidal resonance has been extensively achieved and investigated in nanooptics, sh…
View article: Tunable second harmonic generation from bianisotropic plasmonic metamolecule via utilizing phase change materials
Tunable second harmonic generation from bianisotropic plasmonic metamolecule via utilizing phase change materials Open
In this work, we utilize phase change materials to achieve tunable second harmonic generation from magnetic resonance in bianisotropic plasmonic metamolecules. As a proof-of-concept, we fill the gap of gold split ring resonators (SRRs) wit…
View article: Design, Synthesis and Characterization of a Novel Type of Thermo-Responsible Phospholipid Microcapsule–Alginate Composite Hydrogel for Drug Delivery
Design, Synthesis and Characterization of a Novel Type of Thermo-Responsible Phospholipid Microcapsule–Alginate Composite Hydrogel for Drug Delivery Open
Liposomes are extensively used in drug delivery, while alginates are widely used in tissue engineering. However, liposomes are usually thermally unstable and drug-leaking when in liquids, while the drug carriers made of alginates show low …
View article: Photonic spin Hall effect on an ellipsoidal Rayleigh particle in scattering far-field
Photonic spin Hall effect on an ellipsoidal Rayleigh particle in scattering far-field Open
We present the photonic spin Hall effect on an ellipsoidal Rayleigh particle, which amounts to a polarization-dependent shift in scattering far-field. Based on the dipole model, we demonstrate that such shift is unavoidable when the light …
View article: Efficient Recognition of the Propagated Orbital Angular Momentum Modes in Turbulences With the Convolutional Neural Network
Efficient Recognition of the Propagated Orbital Angular Momentum Modes in Turbulences With the Convolutional Neural Network Open
The vortex beam carrying orbital angular momentum (OAM) has attracted great attentions in optical communication field, which can extend the channel capacity of communication system due to the orthogonality between different OAM modes. Gene…
View article: Dynamics of angular momentum-torque conversion in silicon waveguides
Dynamics of angular momentum-torque conversion in silicon waveguides Open
We present a refined theoretical analysis on the relationship between the optical total angular momenta (TAM) and the optical torque (OT) in a birefringent silicon waveguide. By using the vector angular spectrum method, we demonstrate the …
View article: Tunable THz generalized Weyl points
Tunable THz generalized Weyl points Open
Weyl points, as linearly double degenerated point of band structures, have been extensively researched in electronic and classical wave systems. However, Weyl points' realization is always accompanied with delicate "lattice structures". In…
View article: Compact spoof surface plasmon polaritons waveguide drilled with L-shaped grooves
Compact spoof surface plasmon polaritons waveguide drilled with L-shaped grooves Open
It has been recently demonstrated that a metallic surface with periodic grooves can support a laterally-confined surface wave called spoof plasmon polaritons (SSPPs). Here we propose a SSPPs waveguide drilled with L-shaped grooves which ca…
View article: Propagation factors of multi-sinc Schell-model beams in non-Kolmogorov turbulence
Propagation factors of multi-sinc Schell-model beams in non-Kolmogorov turbulence Open
We derive several analytical expressions for the root-mean-square (rms) angular width and the M(2)-factor of the multi-sinc Schell-model (MSSM) beams propagating in non-Kolmogorov turbulence with the extended Huygens-Fresnel principle and …
View article: Circular polarization analyzer based on an Archimedean nano-pinholes array
Circular polarization analyzer based on an Archimedean nano-pinholes array Open
A relative broadband circular polarization analyzer based on a single-turn Archimedean nano-pinholes array has been proposed and investigated systematically from visible spectrum to near infrared region. The spiral arrangement of circular …
View article: Polarization-independent longitudinal multi-focusing metalens
Polarization-independent longitudinal multi-focusing metalens Open
A novel multi-focusing metalens in the longitudinal direction has been proposed and investigated based on the equal optical path principle, which is independent on the incident polarizations and can be suitable for both of the linear and c…
View article: Current Approach in Surface Plasmons for Thin Film and Wire Array Solar Cell Applications
Current Approach in Surface Plasmons for Thin Film and Wire Array Solar Cell Applications Open
Surface plasmons, which exist along the interface of a metal and a dielectric, have been proposed as an efficient alternative method for light trapping in solar cells during the past ten years. With unique properties such as superior light…
View article: Soliton dynamics in a PT-symmetric optical lattice with a longitudinal potential barrier
Soliton dynamics in a PT-symmetric optical lattice with a longitudinal potential barrier Open
We present dynamics of spatial solitons propagating through a PT symmetric optical lattice with a longitudinal potential barrier. We find that a spatial soliton evolves a transverse drift motion after transmitting through the lattice barri…
View article: Surface plasmon propelled high-performance CdSe nanoribbons photodetector
Surface plasmon propelled high-performance CdSe nanoribbons photodetector Open
In this work, we present a plasmonic photodetector (PPD) with high sensitivity to red light illumination. The ultrasensitive PPD was composed of high-crystalline CdSe nanoribbons (NRs) decorated with plasmonic hollow gold nanoparticles (HG…
View article: Advanced light-trapping effect of thin-film solar cell with dual photonic crystals
Advanced light-trapping effect of thin-film solar cell with dual photonic crystals Open
A thin-film solar cell with dual photonic crystals has been proposed, which shows an advanced light-trapping effect and superior performance in ultimate conversion efficiency (UCE). The shapes of nanocones have been optimized and discussed…