The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We predict weak localization in a completely homogeneous medium with a disordered nonlinearity, Kerr or saturable, characterized by anomalous behavior with polynomially decaying wave functions.
The PT-symmetry breaking for topological defect-states are studied in SSH micro-resonator laser arrays. For defect modes, the PT-symmetry breaking threshold reduces when the coupling strength between closely paired elements is increased. Such topological defect-modes are demonstrated in a 16-ring SSH PT-laser arrangement.
We show topological waveguiding of single and correlated photons generated in a spatially modulated array of silicon nanowires. These are the first experiments with correlated quantum states in any topological photonic system.
We present topologically-protected transport in systems that are topologically trivial, but a long-range nonlinearity induces unidirectional transport and topological immunity to scattering from defects.
We experimentally demonstrate topologically protected optical waveguiding in silicon at the interface between two topologically distinct dimer chains. Further, we propose and demonstrate beating between topological and trivial defect modes.
We experimentally demonstrate topologically protected optical waveguiding in silicon at the interface between two topologically distinct dimer chains. Further, we propose and demonstrate beating between topological and trivial defect modes.
We describe the basic physical mechanisms supporting the formation of spatial solitons in photorefractive crystals, and provide an up-to-date account of the developments in the field.
We demonstrate a novel method for controlling the modal trajectories of Bloch oscillations initiated on the edge of a honeycomb lattice, via the topology of its band structure.
We experimentally demonstrate that disorder can induce a topologically non-trivial phase. We implement this “Topological Anderson Insulator” in arrays of evanescently coupled waveguides and demonstrate its unique features.
We demonstrate theoretically and experimentally the Rashba effect using light in two “counterpropagating” photonic lattices. We observe breaking of inversion symmetry in the resulting band structure.
The interaction of water vapor with polycrystalline gadolinium surface, in the temperature range of 300–570K and water vapor pressure from 2×10 −8 and up to 18Torr, was studied by utilizing Direct-Recoil-Spectrometry, X-ray Photoelectron Spectroscopy and Temperature Programmed Desorption. It has been found that a native Gd surface compound as well as one that was formed by an exposure to 18Torr...
A topological insulator is a completely new phase of matter with an insulating interior and conduction only at the edges [1]. Perhaps its most impressing feature is that the conducting electron states at the edges do not experience scattering in case of defects or disorder due to the Kramers degeneracy, which disallows coupling to the counterpopagating state. This provides a robustness which is otherwise...
We present the first experimental observation of a Floquet Topological Insulator in any physical system. We realize optical topologically-protected unidirectional edge states, without magnetic fields, using honeycomb photonic lattice of helical waveguides.
In contrast to popular belief, it is possible to simulate a relativistic Dirac equation in classical paraxial optical waveguide arrays. Here, we present various simulations of relativistic phenomena in different structures, including so-called “optical graphene”.
Amorphous systems possess various non-intuitive features, entirely based on their intrinsic random structure and absence of any long-range order [1]. One of their most striking properties is the existence of a gap in the spectrum of eigenstates despite the lack of Bragg scattering [2]. Recently, the concept of amorphous lattices exhibiting a band gap was introduced in optics, and demonstrated using...
We demonstrate symbiotic dynamics of light and nano-particles suspended in liquid. Light-force varies the local particle density, modifies the fluid properties (surface-tension, viscosity), inducing flow patterns in the fluid, causing synergetic nonlinear-dynamics of light and fluid.
We present, experimentally and theoretically, coupled defect-waveguides in an amorphous photonic lattice, exhibiting enhanced coupling by virtue of disorder.
We present the first experimental observation of bound states in the continuum in optics, and how the bound state transforms into a leaky mode as symmetry is reduced.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.