Article
Multidisciplinary Sciences
Chenni Xu, Itzhack Dana, Li-Gang Wang, Patrick Sebbah
Summary: This study investigates the nonlinear dynamics of light propagation on a two-dimensional curved surface in a three-dimensional space by considering its equivalent flat billiard with nonuniform distribution of refractive index. The researchers find that the degree of chaos is fully controlled by a single curvature-related geometric parameter of the curved surface, and this analogy between two unrelated systems not only provides a way to control chaos but also has potential applications in various fields.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Review
Physics, Multidisciplinary
Chong Sheng, Shining Zhu, Hui Liu
Summary: This review summarizes recent advances in analogical gravitation based on integrated photonic chips with the aid of transformation optics. Different types of transformation optical structures emulating various phenomena in curved space are discussed, and perspectives for future study are also provided.
ADVANCES IN PHYSICS-X
(2023)
Article
Acoustics
Andrzej Czerwinski, Jan Luczko
Summary: The study investigated the dynamic behavior of curved pipes conveying fluid, comparing experimental results with theoretical predictions and considering the vibration caused by pulsating flow and nonlinear factors. The results showed the effects of curvature, flow velocity, pulsation frequency, and amplitude on parametric vibration.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Mechanical
Liangwei Zeng, Milivoj R. Belic, Dumitru Mihalache, Qing Zhang, Dan Xiang, Xing Zhu
Summary: We study the dynamics of soliton pairs and clusters in the (2 + 1)-dimensional nonlinear Schrodinger equation with self-focusing Kerr nonlinearity and linear potentials. Our model exhibits regular oscillation and rotation of multidimensional solitary structures, achieved by choosing appropriate simple potentials. Through linear stability analysis, we establish the complete robustness of these soliton pairs and clusters, without any distortion even when the potentials evolve along the propagation direction. Furthermore, the oscillating and rotating periods of soliton pairs and clusters can be easily controlled by the parameters of external potentials.
NONLINEAR DYNAMICS
(2023)
Article
Chemistry, Physical
Yanling Jia, Ke Zhang
Summary: Researchers investigated the influence of piezoelectric potential and dipole moment on the electrical output of TENG by fabricating different modes of TENGs with polarized PVDF. They found that the piezoelectric potential can improve the sensing performance of TENG-based pressure sensors, leading to linear response and high sensitivity in a wider range. The sensor shows great potential for applications in human-body monitoring, such as acoustic wave, pulse wave, and respiratory wave.
Review
Optics
Marc Hanna, Florent Guichard, Nour Daher, Quentin Bournet, Xavier Delen, Patrick Georges
Summary: Multipass cells serve as a platform for nonlinear optics, allowing for nonlinear distribution, enhancing robustness of the beam, and exploring various nonlinear phenomena, with engineering potential.
LASER & PHOTONICS REVIEWS
(2021)
Review
Physics, Multidisciplinary
Quentin Glorieux, Tangui Aladjidi, Paul D. Lett, Robin Kaiser
Summary: Nonlinear optics is a highly active field of research, particularly with the discovery of spectacular phenomena after the invention of lasers. Combining high intensity fields with resonant systems has further enhanced nonlinearity and introduced additional effects related to resonances. This paper reviews a limited range of these effects, focusing on close-to-room-temperature atomic vapors as the nonlinear resonant medium. Four-wave mixing and generation of nonclassical light are discussed, along with one-and two-mode squeezing and photon correlations. Applications for optical and quantum memories based on hot atomic vapors are presented, as well as recent developments in the field of quantum fluids of light.
NEW JOURNAL OF PHYSICS
(2023)
Review
Nanoscience & Nanotechnology
Luca Carletti, Marco Gandolfi, Davide Rocco, Andrea Tognazzi, Domenico de Ceglia, Maria Antonietta Vincenti, Costantino De Angelis
Summary: Optically resonant dielectric and semiconductor metasurfaces are promising areas of research in nanophotonics and light-matter interaction, with recent focus on active tuning of linear response and nonlinear effects. Dynamic nonlinear metasurfaces based on these materials could potentially meet the demand for integrated on-chip components with essential functionalities.
Article
Mathematics
Francois Ledrappier, Lin Shu
Summary: We prove that the linear drift of Brownian motion on a closed connected smooth Riemannian manifold with negative sectional curvature is Ck ' 2 differentiable along any Ck curve of Riemannian metrics. We also prove that the stochastic entropy of the Brownian motion is C1 differentiable along any C3 curve of Riemannian metrics with negative sectional curvature. We derive the first derivatives of the linear drift and stochastic entropy, respectively, and show their criticality at locally symmetric metrics.
MEMOIRS OF THE AMERICAN MATHEMATICAL SOCIETY
(2023)
Article
Physics, Condensed Matter
S. S. Shenouda, I. S. Yahia, A. M. Shakra
Summary: Films of indigo dye as organic semiconductors with different thicknesses were prepared using thermal evaporation. The films exhibited a nanocrystalline structure and had multiple optical energy gaps and high nonlinear optical properties.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Optics
Will McCutcheon
Summary: Systems of coupled cavity modes have the potential to provide bright quantum optical states of light, but backscattering and geometrical defects in microring resonators can affect system performance. Through establishing a model and numerical simulations, we studied these issues and evaluated efficiency in various photon schemes.
Article
Optics
Hanyu Li, Hongxia Zhang, Xu Liu, Dagong Jia, Tiegen Liu
Summary: Researchers propose a novel curved fiber compound eye camera (CFCEC) that uses coherent fiber bundles as the optical relay system to transmit sub-images curvilinearly. Experimental results demonstrate the promising potential of CFCEC in terms of field of view and overlap rate, for applications such as panoramic surveillance, 3D detection, and motion tracking.
Article
Mechanics
S. V. Sorokin, S. Lenci
Summary: This paper reconsiders the nonlinear coupling between flexural and longitudinal vibrations of ideally straight elastic beams, using a nonlinear theory of curved beams and employing class-consistent boundary conditions. A paradoxical difference in the nonlinear parts of the Duffing equations obtained in the limit of vanishing curvature and in the case of an ideally straight beam is demonstrated and explained.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Multidisciplinary Sciences
Ming Lun Tseng, Michael Semmlinger, Ming Zhang, Catherine Arndt, Tzu-Ting Huang, Jian Yang, Hsin Yu Kuo, Vin-Cent Su, Mu Ku Chen, Cheng Hung Chu, Benjamin Cerjan, Din Ping Tsai, Peter Nordlander, Naomi J. Halas
Summary: A metalens that can generate and focus VUV light simultaneously has been successfully created by the research team. The metalens is ultracompact and phase-matching free, making it a useful tool for developing low-loss VUV components and increasing the accessibility of VUV light.
Article
Optics
Sergey S. Kruk, Lei Wang, Basudeb Sain, Zhaogang Dong, Joel Yang, Thomas Zentgraf, Yuri Kivshar
Summary: Assembling dissimilar nonlinear dielectric resonators into translucent metasurfaces, the asymmetric parametric generation of light in nonlinear metasurfaces is demonstrated, paving the way for innovative nanophotonic component designs.