Recent research in topological photonics has not only proposed and realized novel
topological phenomena such as one‐way broadband propagation and robust transport of …

Light and sound are the most ubiquitous forms of waves, associated with a variety of
phenomena and physical effects such as rainbows and echoes. Light and sound, both …

Over the past decade, topology has emerged as a major branch in broad areas of physics,
from atomic lattices to condensed matter. In particular, topology has received significant …

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 …

Topological photonics has attracted increasing attention in recent years due to the unique
opportunities it provides to manipulate light in a robust way immune to disorder and defects …

The lattice symmetry of a crystal is one of the most important factors in determining its
physical properties. Particularly, low-symmetry crystals offer powerful opportunities to control …

A quadrupole topological insulator, being one higher-order topological insulator with
nontrivial quadrupole quantization, has been intensely investigated very recently. However …

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IOP Science home Accessibility Help Search Journals Journals list Browse more than 100 …

Negative refraction, an unnatural optical phenomenon in which the incident and the
refracted waves reside on the same side of the surface normal, has been demonstrated with …

A non-Hermitian Weyl equation indispensably requires a three-dimensional (3D)
real/synthetic space, and it is thereby perceived that a Weyl exceptional ring (WER) will not …