Article
Optics
Peijun Chen, Hong Wang
Summary: This article investigates the dynamics and stability of two-dimensional vortex dipole solitons in nonlocal nonlinearity with a PT-symmetric Scarff-II potential. The solitons with single charge and higher-order charge are analyzed using analytical and numerical methods. It is found that the degree of nonlocality affects the evolution of the beams. The vortex dipole solitons undergo stable deformation rather than maintaining their basic profile when the nonlocality is strong. Additionally, the stability of the vortex dipole solitons depends on the potential depth, and there exists a threshold below which the beams can keep their shapes and propagate stably regardless of the strength of nonlocality. Numerical simulations support the analytical results.
Article
Mathematics, Applied
Ming Zhong, Li Wang, Pengfei Li, Zhenya Yan
Summary: We report a novel spontaneous symmetry breaking phenomenon and the existence of ghost states in the framework of the fractional nonlinear Schrodinger equation. The symmetry of fundamental solitons is broken into two branches of asymmetry solitons (ghost states) with complex conjugate propagation constants, exclusively in fractional media. The influences of fractional Levy index (alpha) and saturable nonlinear parameters (S) on the symmetry breaking of solitons are analyzed in detail. Stability analysis, direct propagations, and collision phenomena between symmetric and asymmetric solitons are explored. The results provide a theoretical basis for studying spontaneous symmetry breaking phenomena and related physical experiments in fractional media with PT-symmetric potentials.
Article
Optics
Yuanhang Weng, Hong Wang, Peijun Chen, Geyu Tang
Summary: This paper identifies new soliton families in PT symmetric optical lattices with nonlocal competing cubic-quintic nonlinearity, investigating their existence and stability ranges. The study examines the impact of nonlocality, quintic nonlinearity, and PT symmetry on these solitons, demonstrating that solitons can be linearly stabilized in certain conditions.
OPTICS COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Man Jia, S. Y. Lou
Summary: A novel nonlocal mKdV-sG system is established using the consistent correlated bang method, and abundant nonlinear wave structures are obtained through the linear superposition solution theorem.
Article
Physics, Multidisciplinary
M. Akramov, F. Khashimova, D. Matrasulov
Summary: This study investigates the discrete nonlocal nonlinear Schrodinger equation proposed earlier by Ablowitz and Musslimani on a branched 1D lattice, represented by graphs with discrete bonds. Soliton solutions are derived for some simplest (star and tree) graphs. Numerical solutions are obtained when the problem is not analytically tractable. The integrability of the problem is demonstrated by proving the existence of an infinite number of conservation laws.
Article
Mathematics, Applied
A. R. Thasneem, P. A. Subha
Summary: In this study, the stationary solutions of the coupled nonlinear Schrodinger equation with self-defocusing nonlinearity and super-Gaussian form of parity-time (PT) symmetric potential in an optical system are analyzed. The stationary eigenmodes of the ground and excited states and the influence of the gain/loss coefficient on the eigenvalue spectra are discussed. The threshold condition of the PT-symmetric phase transition of the high and low-frequency modes is studied, and the variation of the threshold values with the coupling constant and the effect of the nonlinearity on the eigenmodes are analyzed. The stability of the solution is verified using linear-stability analysis, and the power distribution of the fundamental solutions with the propagation in the PT and broken PT regimes in the two channels of the system is analyzed.
Article
Engineering, Mechanical
Niladri Ghosh, Amiya Das, Debraj Nath
Summary: This paper investigates the exact solutions and spectrum of the nonlinear Schrodinger equation with complex deformed supersymmetric potential. The study focuses on bright soliton and dark soliton solutions and their stability, which are validated by linear stability analysis and numerical simulations. Furthermore, the paper explores the stable regions of bright and dark solitons through adiabatic transformations of system parameters.
NONLINEAR DYNAMICS
(2023)
Article
Physics, Multidisciplinary
Changming Huang, Hanying Deng, Liangwei Dong, Ce Shang, Bo Zhao, Qiangbo Suo, Xiaofang Zhou
Summary: We investigated the properties of fundamental, multi-peak, and multi-peaked twisted solitons in finite waveguide lattices with asymmetrical diffusion nonlinearity in photorefractive media. The existence domain of two-peaked twisted solitons can be changed by soliton self-bending signals, and stable two-peaked twisted solitons can be found in a larger region when solitons self-bend toward the waveguide lattice. Three-peaked twisted solitons exhibit stability in different regions based on the lattice depth.
Article
Physics, Multidisciplinary
M. E. Akramov, J. R. Yusupov, M. Ehrhardt, H. Susanto, D. U. Matrasulov
Summary: This study investigates the reflectionless propagation of PT-symmetric solitons described by the nonlocal nonlinear Schrodinger equation on a line using the concept of transparent boundary conditions. The transparent boundary conditions for the nonlocal nonlinear Schrodinger equation are derived and confirmed through numerical implementation.
Article
Optics
Mahmut Bagci
Summary: Partially parity-time-symmetric (pPT-symmetric) lattice solitons in quadratic nonlinear media are investigated, showing the possibility of stable evolution of solitons in this type of medium. The effects of varying lattice depth and quadratic nonlinearity strength on the model characteristics are examined comprehensively, and the stability of the solitons is tested using nonlinear evolution and linear stability spectra.
Article
Mathematics, Applied
Yu-Yue Li, Zi-Xiang Zhou
Summary: In this study, a PT-symmetric nonlocal Davey-Stewartson I equation is considered, where solutions are obtained through nonlinear constraints and Darboux transformation. It is proven that under certain conditions, the derived solutions are always globally defined and decay exponentially at spatial infinity, with each asymptotic solution having exactly 4mn peaks and local behavior for each peak provided.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2021)
Article
Physics, Multidisciplinary
Yongping Zhang, Zhu Chen, Biao Wu, Thomas Busch, Vladimir V. Konotop
Summary: The interaction between nonlinearity and PT symmetry in a periodic potential results in peculiar features of nonlinear periodic solutions, including thresholdless symmetry breaking and asymmetric (multi-)loop structures of the nonlinear Bloch spectrum. These features are explained within the framework of a two-mode approximation and an effective potential theory and are validated numerically.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Shengyao Wang, Tuanjie Xia, Weijun Chen, Peng Zhao
Summary: We investigate the existence, stability, and propagation dynamics of one- and two-dimensional defect solitons in an optical lattice with saturable nonlinearity in the fractional Schrodinger equation. The stability of solitons strongly depends on the Levy index, defect strength, and different bandgaps. In one dimension, solitons can exist stably in limited regions in the bandgap with high and low power for both negative and positive defect lattice. In two dimensions, defect solitons can exist stably at high and moderate power regions in the bandgap and all regions in the first bandgap with a negative defect lattice.
Article
Mathematics, Interdisciplinary Applications
Si-Liu Xu, Min Zhu, Jia-Xin Peng, Xi Fan, Qi-Hong Huang, Chun-Bo Hua, Yuan Zhao
Summary: This research proposes a scheme for creating stable light bullets in a cold Rydberg atomic gas system with PT symmetry moire optical lattices. By utilizing local and nonlocal Kerr nonlinearities and PT symmetry moire optical lattices, the researchers were able to obtain stable light bullets with different spatial and temporal distributions. The stability of the light bullets was evaluated through linear-stability analysis and direct simulation.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Physics, Multidisciplinary
Sheng-An Chen, Dumitru Mihalache, Kai Jin, Junyan Li, Jiguang Rao
Summary: This paper investigates the bright solitons on both zero and periodic wave backgrounds in the space-shifted PT-symmetric nonlocal nonlinear Schrödinger equation. The soliton solutions are obtained using the bilinear KP-hierarchy reduction method and expressed in terms of determinants. The collision dynamics of bright two-soliton solutions on the zero background are studied based on their asymptotic expressions. The bright four-soliton solutions can form bound state two-soliton pairs. The dynamics of bright two-soliton solutions on the periodic wave background are found to be completely different from those on the zero background, even when the periodic waves vanish into the background.
ROMANIAN REPORTS IN PHYSICS
(2023)
Article
Optics
Franziska Barkhausen, Stefan Schumacher, Xuekai Ma
Article
Physics, Applied
Xiu Zhang, Zhenshi Chen, Dong Liu, Lei Wan, Xuekai Ma, Tingge Gao
Summary: Transition metal dichalcogenides monolayers, with their atomic-scale thickness, direct band gap, high quantum yield and ease of integration properties, are promising candidates for novel optoelectronic devices. In this research, we demonstrated the manipulation of exciton distribution in WS2 monolayer integrated with a photonic crystal, leading to the distribution of excitons along a specific direction with locked linear polarization up to 60%.
APPLIED PHYSICS EXPRESS
(2022)
Article
Optics
Jiahuan Ren, Qing Liao, Xuekai Ma, Stefan Schumacher, Jiannian Yao, Hongbing Fu
Summary: This study successfully demonstrates the control of spin-orbit interaction of light in organic microcrystals, opening up new possibilities for future photonics and topological photonics.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Xinghui Gao, Wei Hu, Stefan Schumacher, Xuekai Ma
Summary: This work investigates vortex carriers and waveguides in microcavity polariton condensates, revealing their potential applications in information processing. The study demonstrates that by manipulating the shape and width of the pump intensity groove, different types of dark ring states and vortex states can be obtained, leading to the realization of vortex waveguides and one-way vortex transportation.
Article
Multidisciplinary Sciences
Yao Li, Xuekai Ma, Xiaokun Zhai, Meini Gao, Haitao Dai, Stefan Schumacher, Tingge Gao
Summary: This study controls exciton polariton condensates using Rashba-Dresselhaus (RD) spin-orbit coupling. By utilizing CsPbBr3 perovskite microplates as the gain material in a liquid-crystal filled microcavity, an artificial gauge field acting on the CsPbBr3 exciton polariton condensate is achieved, splitting the condensate fractions with opposite spins in both momentum and real space.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Yao Li, Xuekai Ma, Zaharias Hatzopoulos, Pavlos G. Savvidis, Stefan Schumacher, Tingge Gao
Summary: This study demonstrates the existence of an exceptional point in an exciton polariton condensate in a double-well potential, and shows a simple way to optically manipulate the polariton condensation process by switching the condensate on and off near the exceptional point.
Article
Chemistry, Multidisciplinary
Teng Long, Xuekai Ma, Jiahuan Ren, Feng Li, Qing Liao, Stefan Schumacher, Guillaume Malpuech, Dmitry Solnyshkov, Hongbing Fu
Summary: Topological photonics provides an important platform for the development of photonic devices with robust disorder-immune light transport and controllable helicity. In this study, helical polariton lasing was demonstrated from an organic anisotropic microcrystalline cavity, showing significantly enhanced chiral characteristics through nonlinear relaxation process.
Article
Physics, Applied
Ying Gao, Yao Li, Xuekai Ma, Meini Gao, Haitao Dai, Stefan Schumacher, Tingge Gao
Summary: This study demonstrates the realization of anticrossing between a cavity mode and a Bragg mode within an empty microcavity, without the need for birefringent materials in the cavity layer. Nondispersive bands are observed within the energy gap due to the specific refractive index distribution of the sample. The TE-TM splitting and XY splitting of DBR mirrors induce the squeezing of cavity modes in momentum space, resulting in tilted and spin-dependent nondispersive bands.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Jianbo De, Xuekai Ma, Fan Yin, Jiahuan Ren, Jiannian Yao, Stefan Schumacher, Qing Liao, Hongbing Fu, Guillaume Malpuech, Dmitry Solnyshkov
Summary: This research demonstrates a sub-nanosecond electrical field-enhanced polariton condensate switch at room temperature by applying an electric field to a microcavity filled with an organic microbelt. This provides the basis for developing an on-chip integrated photonic device in the strong light-matter coupling regime.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Jichao Jia, Xue Cao, Xuekai Ma, Jianbo De, Jiannian Yao, Stefan Schumacher, Qing Liao, Hongbing Fu
Summary: This study demonstrates a chiral-emitter-free microcavity circularly polarized organic light-emitting diode (CP-OLED) with high dissymmetry factor and luminance. By embedding a thin two-dimensional organic single crystal layer between two metallic mirrors, controllable spin-splitting with circularly polarized dispersions is achieved. This strategy opens up opportunities for practical applications of on-chip microcavity CP-OLEDs.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Jan Wingenbach, Matthias Pukrop, Stefan Schumacher, Xuekai Ma
Summary: The dynamics of phase defects trapped in a finite optically imprinted ring lattice in binary polariton condensates are studied. The Magnus force, spin-orbit interaction, and cross interaction influence the circulation and angular velocity of vortices in the system. These interactions can also lead to elongated and frozen phase defects, triggering the decay of the dark ring solution. The collective motion of multiple vortices is determined by the spin-orbit interaction.
Article
Materials Science, Multidisciplinary
Franziska Barkhausen, Matthias Pukrop, Stefan Schumacher, Xuekai Ma
Summary: The study reveals that in different ring-shaped potentials, the current flow direction of microcavity polariton condensates can change according to the specific configuration of the potentials, with co-flowing currents in concentric rings and counterflowing currents in eye-shaped configurations.
Article
Physics, Multidisciplinary
Yan Xue, Igor Chestnov, Evgeny Sedov, Evgeniy Kiktenko, Aleksey K. Fedorov, Stefan Schumacher, Xuekai Ma, Alexey Kavokin
Summary: Superposition states of circular currents of exciton-polaritons mimic superconducting flux qubits. Phase of a polariton fluid must change by integer multiples of 2 pi around a ring, with the possibility of introducing a pi-phase delay line to control circular currents. This technology has the potential to be a valuable alternative to superconducting qubits, with the ability to perform single-qubit logic operations and design gates for quantum computations.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Bernd Berger, Daniel Schmidt, Xuekai Ma, Stefan Schumacher, Christian Schneider, Sven Hofling, Marc Assmann
Article
Materials Science, Multidisciplinary
Matthias Pukrop, Stefan Schumacher, Xuekai Ma
