Liangwei Dong
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View article: Hopfions in the Lee-Huang-Yang superfluids
Hopfions in the Lee-Huang-Yang superfluids Open
It is known that, under appropriate conditions, mean-field interactions can be canceled in binary BEC, leading to the formation of the Lee-Huang-Yang (LHY) superfluid, in which the nonlinearity is solely represented by the quartic LHY term…
View article: Vortex solitons in Rydberg atoms system with twisted <i>PT</i> -symmetric photonic lattices
Vortex solitons in Rydberg atoms system with twisted <i>PT</i> -symmetric photonic lattices Open
This study presents a theoretical model for generating vortex solitons (VSs) in a Rydberg atomic system with twisted PT -symmetric photonic lattices. Numerical simulations are conducted via the modified square operator and split-step Fouri…
View article: Hopfions in the Lee-Huang-Yang Superfluids
Hopfions in the Lee-Huang-Yang Superfluids Open
View article: Existence and stability of dissipative solitons in a dual-waveguide lattice with linear gain and nonlinear losses
Existence and stability of dissipative solitons in a dual-waveguide lattice with linear gain and nonlinear losses Open
In this study, we investigate the existence and stability of in-phase and out-of-phase dissipative solitons in a dual-waveguide lattice with linear localized gain and nonlinear losses under both focusing and defocusing nonlinearities. Nume…
View article: Stable higher-order vortex quantum droplets in an annular potential
Stable higher-order vortex quantum droplets in an annular potential Open
We address the existence, stability, and evolution of two-dimensional vortex quantum droplets (VQDs) in binary Bose-Einstein condensates trapped in a ring-shaped potential. The interplay of the Lee-Huang-Yang-amended nonlinearity and trapp…
View article: Multipole solitons in competing nonlinear media with an annular potential
Multipole solitons in competing nonlinear media with an annular potential Open
We address the existence, stability, and propagation dynamics of multipole-mode solitons in cubic-quintic nonlinear media with an imprinted annular (ring-shaped) potential. The interplay of the competing nonlinearity with the potential ena…
View article: Stable higher-charge vortex solitons in the cubic-quintic medium with a ring potential
Stable higher-charge vortex solitons in the cubic-quintic medium with a ring potential Open
We put forward a model for trapping stable optical vortex solitons (VSs) with high topological charges $m$. The cubic-quintic nonlinear medium with an imprinted ring-shaped modulation of the refractive index is shown to support two branche…
View article: Topological properties of tetratomic Su–Schrieffer–Heeger chains with hierarchical long-range hopping
Topological properties of tetratomic Su–Schrieffer–Heeger chains with hierarchical long-range hopping Open
We propose a new generalized Su–Schrieffer–Heeger model with hierarchical long-range hopping based on a one-dimensional tetratomic chain. The properties of the topological states and phase transition, which depend on the cointeraction of t…
View article: Vortex Solitons in Twisted Circular Waveguide Arrays
Vortex Solitons in Twisted Circular Waveguide Arrays Open
We address the formation of topological states in twisted circular waveguide arrays and find that twisting leads to important differences of the fundamental properties of new vortex solitons with opposite topological charges that arise in …
View article: Modulational instability of a resonantly polariton condensate in discrete lattices
Modulational instability of a resonantly polariton condensate in discrete lattices Open
We study modulational instability of a resonantly polariton condensate in a discrete lattice. Employing a discrete gain-saturation model, we derive the dispersion relation for the modulational instability by means of the linear-stability a…
View article: Rotating asymmetric solitons in competing nonlinear media
Rotating asymmetric solitons in competing nonlinear media Open
We predict a novel family of off-center localized nonlinear modes in a rotating optical system. The whispering-gallery-like solitons bifurcate out from the symmetric fundamental solitons through a symmetry breaking. They can appear as loca…
View article: Fundamental and multipole solitons in amplitude-modulated Fibonacci lattices
Fundamental and multipole solitons in amplitude-modulated Fibonacci lattices Open
We investigated the existence and stability of fundamental and multipole solitons supported by amplitude-modulated Fibonacci lattices with self-focusing nonlinearity. Owing to the quasi-periodicity of Fibonacci lattices, families of solito…
View article: Optical solitons supported by finite waveguide lattices with diffusive nonlocal nonlinearity*
Optical solitons supported by finite waveguide lattices with diffusive nonlocal nonlinearity* Open
We investigate the properties of fundamental, multi-peak, and multi-peaked twisted solitons in three types of finitewaveguide lattices imprinted in photorefractive media with asymmetrical diffusion nonlinearity. Two opposite soliton self-b…
View article: Dissipative solitons supported by transversal single- or three-channel amplifying chirped lattices
Dissipative solitons supported by transversal single- or three-channel amplifying chirped lattices Open
We study the properties of dissipative solitons supported by a chirped lattice in a focusing Kerr medium with nonlinear loss and a transversal linear gain landscape consisting of single or three amplifying channels. The existence and stabi…
View article: Simultaneous measurement of liquid surface tension and contact angle by light reflection
Simultaneous measurement of liquid surface tension and contact angle by light reflection Open
We present an optical method of simultaneous measurement of liquid surface tension, contact angle, and the curved liquid surface shape, which uses the light reflection from this liquid surface due to the wettability. When an expanded and c…
View article: Localization and Anderson delocalization of light in fractional dimensions with a quasi-periodic lattice
Localization and Anderson delocalization of light in fractional dimensions with a quasi-periodic lattice Open
We address the properties of wavepacket localization-delocalization transition (LDT) in fractional dimensions with a quasi-periodic lattice. The LDT point, which is generally determined by the competition between two sub-lattices comprisin…
View article: Composition Relation between Nonlinear Bloch Waves and Gap Solitons in Periodic Fractional Systems
Composition Relation between Nonlinear Bloch Waves and Gap Solitons in Periodic Fractional Systems Open
Evolution of beams in nonlinear optical media with a fractional-order diffraction is currently attracting a growing interest. We address the existence of linear and nonlinear Bloch waves in fractional systems with a periodic potential. Und…
View article: Double-hump solitons in fractional dimensions with a 𝒫𝒯–symmetric potential
Double-hump solitons in fractional dimensions with a 𝒫𝒯–symmetric potential Open
We investigate the properties of double-hump solitons supported by the nonlinear Schrödinger equation featuring a combination of parity-time symmetry and fractional-order diffraction effect. Two classes of nonlinear states, i.e., out-of-ph…
View article: Surface gap solitons in a nonlinear fractional Schrödinger equation
Surface gap solitons in a nonlinear fractional Schrödinger equation Open
We address the propagation dynamics of gap solitons at the interface between uniform media and an optical lattice in the framework of a nonlinear fractional Schrödinger equation. Different families of solitons residing in the first and sec…
View article: Tunable band-gap structure and gap solitons in the generalized Gross-Pitaevskii equation with a periodic potential
Tunable band-gap structure and gap solitons in the generalized Gross-Pitaevskii equation with a periodic potential Open
The tunable band-gap structure is fundamentally important in the dynamics of both linear and nonlinear modes trapped in a lattice because Bloch modes can only exist in the bands of the periodic system and nonlinear modes associating with t…
View article: Accelerating Airy Beams Along Tunable Propagation Trajectories
Accelerating Airy Beams Along Tunable Propagation Trajectories Open
We present a simple and highly efficient approach to directly generate tunable Airy beams, which can propagate along arbitrary monotonic curves. Such beams are generated by modulating a Gaussian beam imposed by tunable phase-only patterns.…
View article: Beam propagation management in a fractional Schrödinger equation
Beam propagation management in a fractional Schrödinger equation Open
View article: Diffraction management and soliton dynamics in frequency-chirped ℙT symmetric lattices
Diffraction management and soliton dynamics in frequency-chirped ℙT symmetric lattices Open
We address two closely related problems: diffraction management and soliton dynamics in parity-time ( ℙT) symmetric lattices with a quadratic frequency modulation. The normal, anomalous, or zero diffraction is possible for narrow beams wit…