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Vortex solitons in moire optical lattices
Sergey K. Ivanov, Vladimir V. Konotop, Yaroslav V. Kartashov +1
We show that optical moire lattices enable the existence of vortex solitons of different types in self-focusing Kerr media. We address the properties of such states both in lattice…
Photonic Snake States in Two-Dimensional Frequency Combs
Salim B. Ivars, Yaroslav V. Kartashov, Pedro Fernández de Córdoba +3
Taming the instabilities inherent to many nonlinear optical phenomena is of paramount importance for modern photonics. In particular, the so-called snake instability is universally…
Light bullets in Su-Schrieffer-Heeger photonic topological insulators
Sergey K. Ivanov, Yaroslav V. Kartashov, Lluis Torner
We introduce a different class of thresholdless three-dimensional soliton states that form in higher-order topological insulators based on a two-dimensional Su-Schrieffer-Heeger ar…
Two-dimensional Thouless pumping of light in photonic moiré lattices
Peng Wang, Qidong Fu, Ruihan Peng +4
Continuous and quantized transports are profoundly different. The latter is determined by the global rather than local properties of a system, it exhibits unique topological featur…
Vortex solitons in twisted circular waveguide arrays
Liangwei Dong, Yaroslav V. Kartashov, Lluis Torner +1
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 vorte…
Surface Bound States in the Continuum in Dyakonov Structures
Samyobrata Mukherjee, David Artigas, Lluis Torner
Surface bound states in the continuum (SBICs) have been found to occur in diverse settings, but so far always at the interface of non-homogeneous media, such as discrete lattices o…
Floquet Edge Multicolor Solitons
Sergey K. Ivanov, Yaroslav V. Kartashov, Alexander Szameit +2
Topological insulators are unique physical structures that are insulators in their bulk, but support currents at their edges which can be unidirectional and topologically protected…
Multi-frequency solitons in commensurate-incommensurate photonic moiré lattices
Yaroslav V. Kartashov, Fangwei Ye, Vladimir V. Konotop +1
We predict that photonic moiré patterns created by two mutually twisted periodic sublattices in quadratic nonlinear media allow the formation of parametric solitons under condition…
Unidirectional guided resonances in anisotropic waveguides
Samyobrata Mukherjee, Jordi Gomis-Bresco, David Artigas +1
We show that anisotropic planar anti-guiding waveguide structures with two radiation channels towards the surrounding cladding materials can support unidirectional guided resonance…
Nonlinear second-order photonic topological insulators
Marco S. Kirsch, Yiqi Zhang, Mark Kremer +7
Higher-order topological insulators (HOTI) are a novel topological phase beyond the framework of the conventional bulk-boundary correspondence. In these peculiar systems, the topol…
Reversible Self-Replication of Spatio-Temporal Kerr Cavity Patterns
Salim B. Ivars, Yaroslav V. Kartashov, Lluis Torner +2
We uncover a novel and robust phenomenon that causes the gradual self-replication of spatiotemporal Kerr cavity patterns in cylindrical microresonators. These patterns are inherent…
Optical soliton formation controlled by angle twisting in photonic moiré lattices
Qidong Fu, Peng Wang, Changming Huang +4
Exploration of the impact of synthetic material landscapes featuring tunable geometrical properties on physical processes is a research direction that is currently of great interes…
Solitary Spectrally-Discrete Bound States in the Continuum in an Open System
Samyobrata Mukherjee, Jordi Gomis-Bresco, David Artigas +1
Bound states in the continuum (BICs) exist in a variety of physical systems where they appear as lossless propagating states surrounded by radiating modes. However, in the case of…
Nonlinearity-induced photonic topological insulator
Lukas J. Maczewsky, Matthias Heinrich, Mark Kremer +8
The hallmark feature of topological insulators renders edge transport virtually impervious to scattering at defects and lattice disorder. In our work, we experimentally demonstrate…
Localization and delocalization of light in photonic moire lattices
Peng Wang, Yuanlin Zheng, Xianfeng Chen +5
Moire lattices consist of two identical periodic structures overlaid with a relative rotation angle. Present even in everyday life, moire lattices have been also produced, e.g., wi…
Slow light mediated by mode topological transitions in hyperbolic waveguides
Pilar Pujol-Closa, Jordi Gomis-Bresco, Samyobrata Mukherjee +3
We show that symmetric planar waveguides made of a film composed of a type II hyperbolic metamaterial, where the optical axis (OA) lays parallel to the waveguide interfaces, result…
Nonlinear higher-order polariton topological insulator
Yiqi Zhang, Y. V. Kartashov, L. Torner +2
We address the resonant response and bistability of the exciton-polariton corner states in a higher-order nonlinear topological insulator realized with kagome arrangement of microc…
Vector Topological Edge Solitons in Floquet Insulators
Sergey K. Ivanov, Yaroslav V. Kartashov, Alexander Szameit +2
We introduce topological vector edge solitons in a Floquet insulator, consisting of two honeycomb arrays of helical waveguides with opposite directions of rotation in a focusing no…
Angular Control of Anisotropy-Induced Bound States in the Continuum
Samyobrata Mukherjee, Jordi Gomis-Bresco, Pilar Pujol-Closa +2
Radiation of leaky modes existing in anisotropic waveguides can be cancelled by destructive interference at special propagation directions relative to the optical axis orientation,…
Transition from Dirac points to exceptional points in anisotropic waveguides
Jordi Gomis-Bresco, David Artigas, Lluis Torner
We uncover the existence of Dirac and exceptional points in waveguides made of anisotropic materials, and study the transition between them. Dirac points in the dispersion diagram…
Anisotropy-induced photonic bound states in the continuum
Jordi Gomis-Bresco, David Artigas, Lluis Torner
Bound states in the continuum (BICs) are radiationless localized states embedded in the part of the parameter space that otherwise corresponds to radiative modes. Many decades afte…
Robust ultrashort light bullets in strongly twisted waveguide arrays
Carles Milián, Yaroslav V. Kartashov, Lluis Torner
We introduce a new class of stable light bullets that form in twisted waveguide arrays pumped withultrashort pulses, where twisting offers a powerful knob to tune the properties of…
Topological properties of bound-states-in-the-continuum in geometries with broken anisotropy-symmetry
Samyobrata Mukherjee, Jordi Gomis-Bresco, Pilar Pujol-Closa +2
Waveguiding structures made of anisotropic media support bound states in the continuum (BICs) that arise when the radiation channel of otherwise semi-leaky modes is suppressed. Hit…
New Frontiers in Multidimensional Self-Trapping of Nonlinear Fields and Matter
Yaroslav V. Kartashov, Gregory E. Astrakharchik, Boris A. Malomed +1
We review the state of the art and recently obtained theoretical and experimental results for two- and three-dimensional (2D and 3D) solitons and related states, such as quantum dr…