Dongmei Deng

Dongmei Deng
South China Normal University · School for Information and Optoelectronic Science and Engineering

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264
Publications
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Introduction
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Publications

Publications (264)
Article
Full-text available
In this paper, we propose a mixed radio frequency (RF)/free space optical (FSO) unmanned aerial vehicle (UAV) communication system, based on modulating retro-reflector (MRR) and reconfigurable intelligent surface (RIS), which adopts the hybrid L-ary pulse position modulation-binary phase shift keying-subcarrier intensity modulation (L-PPM-BPSK-SIM)...
Article
Full-text available
The Airy transform of Ince–Gaussian beams (IGBs) is studied analytically and numerically. The signs of transverse numerical scales determine the position of the spot, but they have no influence in the intensity of the spot. When the absolute values of the transverse numerical scales are larger than the Gauss waist in the initial plane, the Airy fea...
Article
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Versatile twisted optical bottles (TOBs) generated from a series of abruptly autofocusing beams are derived numerically and experimentally. This novel kind of TOB beam utilizes the dual autofocus, optical-vortex and astigmatic-phase properties to structure one or more three-dimensional, closed, dark regions, the bottle space. To the best of our kno...
Article
Full-text available
A novel class of coherent structures of inseparability, incorporating phases asymmetrically cross-coupled by two position vectors, is introduced in theory and experiment. These phases disappear in the environment of complete coherence, but the vanishment is avoidable in the coexistent state of extreme incoherence and full coherence. The radiated be...
Article
Full-text available
The Talbot-like effect of symmetric Pearcey beams (SPBs) is presented numerically and experimentally in the free space. Owing to the Talbot-like effect, the SPBs have the property of periodic, multiple autofocusing and self-healing. Meanwhile, the focusing positions and focusing times of SPBs are controlled by the beam shift factor and the distribu...
Article
We examine a tunable spin Hall effect of light (SHEL) on the surface of topological insulators (TIs) under the influence of an external magnetic field, to the best of our knowledge, which can be regarded as the magneto-optical SHEL. It is revealed that the position of the Brewster angle and the value of the SHEL shifts are decided by the dissipativ...
Article
Full-text available
Tornado waves (ToWs), which refer to a light accelerates and twists over both the radial and the angular directions, have gained a great deal of interest since the concept was introduced by Brimis et al. In this paper, we superimpose two pairs of ring swallowtail vortex beams (RSVBs) to generate ToWs and we call them tornado swallowtail waves (ToSW...
Article
In this paper, the propagation dynamics of an odd-Pearcey Gauss beam (OPGB) in uniaxial crystals along the optical axis governed by the Pockels effect is analytically and numerically investigated. In this case, the left-hand circularly polarized OPGB gives rise to the right-hand vortex component possessing a topological charge of 2. Results show th...
Article
Full-text available
In this letter, to the best of our knowledge, a new class of an accelerating self-imaging surface plasmonic wave, the Airy-Talbot plasmon, is introduced for the first time. Such surface wave propagates at the interface between metal (silver) and dielectric material (air) and causes a strong interference along curved trajectories, which generates th...
Article
In this paper, by applying the Collins integral formula, we obtain the analytical solution of the superimposed chirped Bessel–Gaussian vortex beam(SCBGVB) in strongly nonlocal nonlinear medium(SNNM). We investigate the SCBGVB’s propagation behaviors as well as the distribution of the intensity and the phase of the periodic self-focusing light field...
Article
We introduce controllable Laguerre Gaussian wave packets (LGWPs) with self-accelerating and self-focusing properties along their predesigned parabolic trajectory via phase modulation. Numerically and experimentally recorded intensity patterns of controllable LGWPs with topological charges are obtained, and it is obvious that they agree well with th...
Article
Full-text available
Free-space optical communication (FSO) technology has wide prospects in deep space exploration, but it will encounter coronal turbulence during superior solar conjunction, and solar scintillation will seriously affect the communication quality. In this paper, we propose a terrestrial–deep space hybrid radio frequency (RF)/FSO system with the hybrid...
Article
An auto-focusing beam with adjustable symmetry is proposed numerically and experimentally. The initial field of the auto-focusing Lommel Gaussian vortex beam (ALoGVB) consists of the Lommel function and the Gaussian term. When the asymmetry factor ε of the beam approaches zero, the ALoGVB will degenerate into a circular Bessel Gaussian vortex beam...
Article
Full-text available
In this paper, the polycyclic tornado circular swallowtail beam (PTCSB) with autofocusing and self-healing is generated numerically and experimentally and their properties are investigated. Compared with the circular swallowtail beam (CSB), the optical distribution of the PTCSB presents a tornado pattern during the propagation. The number of the sp...
Preprint
Full-text available
The Talbot like effect of symmetric Pearcey beams (SPBs) is presented numerically and experimentally in the free space. Owing to the Talbot like effect, the SPBs have the property of periodic and multiple autofocusing. Meanwhile, the focal positions and focal times of SPBs are controlled by the beam shift factor and the distribution factors. What i...
Article
Full-text available
A new type of Airy beam arisen from the modification of Fourier spectrum is introduced numerically and experimentally. The autofocusing Airy beam (AAB) exhibits the features of off-axis autofocusing and transverse self-accelerating, producing a needle-like focus in the longitudinal direction and a tiny focal spot at the focusing plane. Furthermore,...
Article
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The propagation of a new type of Ince-Gaussian-like beam along a predesigned parabolic trajectory in the free space is investigated numerically and experimentally. The Ince-Gaussian-like beam breaks the characteristic that the shape remains invariant during propagation and it obtains the property of self-focusing that the unmodulated Ince-Gaussian...
Article
Full-text available
A new kind of open-end optical bottle formed by launching the circular Airy Gaussian vortex beams (CAGVBs) in the parabolic potential is demonstrated. Compared to the circular Airy beams, the CAGVBs in the parabolic potential still maintain abruptly auto-focusing property, but their focus spot is hollow. The focal intensity and the focal position c...
Article
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We introduce a new type of multiple and off-axis optical bottles (OBs) based on the chirped circular Pearcey Gaussian vortex beam. This kind of beam allows generating the OBs with perfect bottle shape through coherent superposition. Besides, we show that the number and the position of the OBs can be precisely and flexibly controlled. The experiment...
Article
In this paper, a class of one-dimensional (1D) Fibonacci quasi-periodic multilayers composed of two parity-time-symmetric (PT-symmetric) elements are designed. Their scattering spectra, transparencies, invisibilities, and other singular optical properties are investigated in detail. It is found that three types of new systematic phases, ten types o...
Article
We introduce the propagation of Pearcey Gaussian (PG) beams in a strongly nonlocal nonlinear medium (SNNM) analytically. Our results show that PG beams propagating in the SNNM have two different focusing positions. The intensity peak appears at different focusing positions depending on the selection of the nonlinear parameters. In addition, the eff...
Preprint
We address the propagation of vortex beams with the circular Airy-Gaussian shape in a (2+1)-dimensional optical waveguide modeled by the fractional nonlinear Schrodinger equation. Systematic analysis of autofocusing of the beams reveals a strongly non-monotonous dependence of the peak intensity in the focal plane on the corresponding Levy index, wi...
Article
In this paper, we extend a circular Pearcey beam (CPB) to an elliptical Pearcey beam (EPB) with the elliptical parameters t and θ theoretically and experimentally. In contrast to the CPB and the elliptical Airy beam, the EPB is more diverse and tunable, endowed with double focusing property due to the convergence process out of synchronization alon...
Article
To study the effect of structural symmetry on both the quantity and quality of singular optical properties, a one-dimensional parity-time-symmetric (PT-symmetric) Thue–Morse (TM) optical-waveguide networks family is built and investigated. It is shown that this type of optical waveguide networks can produce 15 types of singular optical properties t...
Article
In this paper, the singular optical properties of the interesting one-dimensional (1D) Fibonacci optical waveguide networks composed of parity-time-symmetric (PT-symmetric) elements (FCOWNCPTSEs) are studied. It is found that there are three types of systematic phases defined by the modulus of the eigenvalues of the scattering matrix, eleven types...
Article
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Light-field shaping technology plays an important role in optics and nanophotonics. For instance, the spatially structured light field, which exhibits characteristic features in complex phases, light intensity, and polarization, is crucial to understanding new physical phenomena and exploring practical applications. Herein, we propose and demonstra...
Article
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In this paper, the circle Bessel Gaussian vortex beams (CBGVBs) are introduced in a harmonic potential for the first time, whose autofocusing properties are explored by theoretical analysis as well as numerical simulation. According to the dimensionless linear (2+1)D Schrödinger equation, we numerically simulate the transmission trajectories of dif...
Article
Full-text available
In this paper, the propagation properties of the odd-Pearcey Gaussian beam (OPGB) in a parabolic potential are investigated analytically and numerically. Except the auto-focusing at the focal plane, the OPGB performs a weak off-axis focusing unexpectedly. The focusing distance and the focal intensity can be adjusted by choosing an appropriate parab...
Article
A new kind of structured optical bottle (OB) beam generated by the second order chirped ring symmetric Airy vortex beam (CRSAVB) is derived. The optical vortices (OVs) and the chirped factor on the CRSAVB play a significant role on controlling the sizes, quantities and locations of the OBs. The OVs also play an important role on the rotation of the...
Article
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We introduce the effects of the multi-order and off-axis vortex on the propagation of Pearcey Gaussian vortex beams (PGVBs) in a chiral medium. The effects of vortex positions, topological charges and chiral parameters on the light intensity distribution, the intensity concentration, the focusing position and the radiation force are studied. In add...
Article
A new source for a controllable rotating elliptical Gaussian Schell-model vortex optical coherence lattice with both spiral phase and rotation phase is introduced. It is shown that both the irradiance distribution of lattice and the degree of coherence (DOC) rotate synchronously in the same direction within a certain propagation, whose rotation vel...
Article
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In this paper, we use the rotating elliptical Gaussian beams(REGBs) to impinge the surfaces coated with cross-anisotropic metasurfaces(CMs) to investigate the Goos-Hänchen(GH) and Imbert-Fedorov(IF) shifts. The effect of the CM coating on the reflection coefficient in this system is considered. In particular, we will show that the angle of incidenc...
Article
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Based on the extended Huygens–Fresnel integral, the analytical expressions for the average intensity of a partially coherent radially polarized rotating elliptical cosine-Gaussian optical lattice (PCRPREGOL) in the anisotropic turbulence are derived. We find that the lattice intensity profile and the spatial degree of coherence will display periodi...
Article
Full-text available
In this article, we present a new kind of autofocusing surface plasmonic wave: the Pearcey plasmon. The result shows that the Pearcey plasmon evolves at the silver-air interface in the form of two-dimensional Pearcey plasmon function. And the Pearcey plasmon can be decomposed into two Airy-like plasmons bending in the opposite direction after autof...
Article
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By applying quadratic and linear phase modulations (QPM and LPM), the propagation properties of the partially coherent dual and quad Airy beams which maintain acceleration in free space are studied. They are generated by superimposing two and four partially coherent Airy beams whose phase is modulated in the source field. It is demonstrated that th...
Preprint
We analyze the propagation dynamics of radially polarized symmetric Airy beams (R-SABs) in a (2+1)-dimensional optical system with fractional diffraction, modeled by the fractional Schr\"odinger equation (FSE) characterized by the L\'evy index. The autofocusing effect featured by such beams becomes stronger, while the focal length becomes shorter,...
Article
We analyze the propagation dynamics of radially polarized symmetric Airy beams (R-SABs) in a (2+1)-dimensional optical system with fractional diffraction, modeled by the fractional Schrödinger equation (FSE) characterized by the Lévy index, α. The autofocusing effect featured by such beams becomes stronger, while the focal length becomes shorter, w...
Article
Full-text available
A new type of radially polarized odd‐Pearcey Gaussian beam (RPOPGB) whose paraxial propagation in free space is studied analytically and numerically, is introduced. Intriguingly, the energy of RPOPGBs is found to auto‐focus several times with the Gaussian beam waist radius increasing to some certain extents. Furthermore, RPOPGBs exhibit a special t...
Article
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In this letter, a new type of autofocusing and symmetric beam arisen from two quartic spectral phases is introduced in theory and experiment. The symmetric Pearcey Gaussian beam (SPGB) formed with a Gaussian term and two multiplying Pearcey integrals, processes a focusing intensity approximately 1.32 times stronger than the intensity of the symmetr...
Article
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We derive analytical solutions that describe the one-dimensional displaced and chirped symmetric Pearcey Gaussian beam in a uniformly moving parabolic potential. The multiple effective manipulations of the beam, which are originated from the diverse configurations of the dynamic parabolic potential, are demonstrated. On the whole, the accelerating...
Article
A series of periodic networks is designed, in which all of the unit cells construct a series of fractal triangles, and their extraordinary optical characteristics for producing ultrawide photonic bandgap (PBG) and ultrastrong photonic localization are investigated. The results indicate that with increasing fractal generation, the number of equivale...
Article
The Goos-Hänchen (GH) shift of a Gaussian beam reflected from surfaces coated with a cross-anisotropic metasurface (CM) is theoretically investigated. It is revealed that, the CM coating has influence on the spatial GH shift as well as the angular one, only at the total internal reflection condition, where the incident angle θ is above critical ang...
Article
A new type of Pearcey-like vortex beam, generated by the appropriate phase modulation of the optical wavefront, which propagates along a predesigned parabolic trajectory in the free space, is presented. This kind of beam forms several oval closed rings with uneven intensity and focuses along the trajectory. It forms a bending optical bottle (OB) an...
Article
We report tightly focused characteristics of the auto-focusing linear polarized circular Pearcey Gaussian vortex beams (CPeGVBs) with on-axis and off-axis vortex pairs through high numerical aperture in this paper. Compared with the linear polarized Airy beam, we find that the autofocusing linear polarized CPeGVBs are rotating during the tightly fo...
Article
We introduce axisymmetric Airy-Gaussian vortex beams in a model of an optical system based on the (2+1)-dimensional fractional Schrödinger equation (FSE), characterized by its Lévy index (LI), 1<α⩽2. By means of numerical methods, we explore propagation dynamics of the beams with vorticities from 0 to 4. The propagation leads to abrupt autofocusing...
Article
Full-text available
We propose a new class of abruptly autofocusing beams, the chirped annular Bessel Gaussian beams (CABGBs), which are based on the radial Bessel profile. By using the Rayleigh–Sommerfeld diffraction formula, the nonparaxial propagation of the CABGBs is investigated. We find that the initial chirp with negative value tends to intensify the abruptly a...
Preprint
We introduce axisymmetric Airy-Gaussian vortex beams in a model of an optical system based on the (2+1)-dimensional fractional Schr\"odinger equation, characterized by its L\'evy index (LI). By means of numerical methods, we explore propagation dynamics of the beams with vorticities from 0 to 4. The propagation leads to abrupt autofocusing, followe...
Preprint
We have investigated the propagation dynamics of the circular Airy Gaussian vortex beams (CAGVBs) in a (2+1)-dimesional optical system discribed by fractional nonlinear Schr\"odinger equation (FNSE). By combining fractional diffraction with nonlinear effects, the abruptly autofocusing effect becomes weaker, the radius of the focusing beams becomes...
Article
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The evolution dynamic properties of self-accelerating Hermite complex-variable-function Gaussian (SHCG) wave packets in highly nonlocal nonlinear media are investigated. Analytical results from a (3+1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{ma...
Article
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Modulated by the spatial phase, Airy-like beams that possess the faster and better self-healing as well as the greater acceleration along the desired arbitrary trajectory are introduced. Airy-like beams have the strong spontaneous-focusing ability and the peak value of the focal plane is 5.4 times that of the initial plane when traveling along the...
Article
An analytical expression of the rotating elliptical chirped Gaussian (RECG) beam in uniaxial crystals orthogonal to the optical axis has been derived. The uniaxial crystals considered here are the tourma-line, the quartz and the fictional crystal. The rotating dynamics, the gradient force and the scattering force of the beam in these uniaxial cryst...
Article
In our study, an analytical expression of the second order chirped Pearcey Gaussian vortex beam (CPGVB) in a medium with a parabolic refractive index is derived. We demonstrate its propagation behaviors as well as the effects of the parameters on the propagation properties. Expectedly, the CPGVB performs periodically automatic Fourier transform in...
Article
Full-text available
We introduce numerically a new polycyclic tornado ring Airy beam (PTRAB) induced by annular spiral zone phases with the second order chirped factor. The PTRAB has such properties of controllable multi focuses, the multi optical bottles and rotation. By choosing appropriate parameters, we can control the times of the multi autofocus and the autofocu...
Article
Full-text available
The atmospheric turbulence (AT) causes distortion of phase fronts of orbital angular momentum (OAM) beams, which hinders the recognition of OAM modes. Convolutional neural network (CNN), a deep learning (DL) technique, can be utilized to realize the effective recognition of OAM modes. In this article, we propose a properly designed six-layer CNN mo...