The topological properties of an object, associated with an integer called the topological
invariant, are global features that cannot change continuously but only through abrupt …

Metasurfaces are subwavelength structured thin films consisting of arrays of units that allow
the control of polarization, phase, and amplitude of light over a subwavelength thickness …

The topological protection of wave transport, originally observed in the context of the
quantum Hall effect in two-dimensional electron gases, has been shown to apply broadly to …

In many contexts, interaction between particles gives rise to emergent phenomena. An
example is the fractional quantum Hall effect, where the interaction between electrons leads …

Exploring the interplay between topological band structures and tunable nonlinearities has
become possible with the development of synthetic lattice systems. In this emerging field of …

Topological materials, whether in solid state, photonic or acoustic systems, or other
domains, are characterized by bulk topological invariants that remain unchanged as long as …

We examine the role of strong nonlinearity on the topologically robust edge state in a one-
dimensional system. We consider a chain inspired from the Su-Schrieffer-Heeger model but …

As first demonstrated by the characterization of the quantum Hall effect by the Chern
number, topology provides a guiding principle to realize the robust properties of condensed …

During the last decades, researchers of different scientific areas have investigated several
systems and materials to suggest new ways of transporting and localizing light. These …

Anomalous Floquet topological insulators with vanishing Chern numbers but supporting
chiral edge modes are attracting more and more attention. Since the existing anomalous …