The rapid development of additive manufacturing has fueled a revolution in various research
fields and industrial applications. Among the myriad of advanced 3D printing techniques …

Originally discovered in condensed matter systems, topological insulators (TIs) have been
ubiquitously extended to various fields of classical wave physics including photonics …

We demonstrate, both theoretically and experimentally, the concept of nonlinear second-
order topological insulators, a class of bulk insulators with quantized Wannier centers and a …

Combination of topology and general relativity can lead to some profound and farsighted
predictions. It is well known that symmetry breaking of the Higgs vacuum field in the early …

Non-Euclidean geometry, discovered by negating Euclid's parallel postulate, has been of
considerable interest in mathematics and related fields for the description of geographical …

Topology have prevailed in a variety of branches of physics. And topological defects in
cosmology are speculated akin to dislocation or disclination in solids or liquid crystals. With …

Topological materials have been at the forefront of research across various fields of physics
in hopes of harnessing properties such as scatterfree transport due to protection from …

Overcoming the diffraction limit is crucial for obtaining high-resolution images and observing
fine microstructures. With this conventional difficulty still puzzling us and the prosperous …

General relativity uses curved space-time to describe accelerating frames. The movement of
particles in different curved space-times can be regarded as equivalent physical processes …

As an analog model of general relativity, optics on some two-dimensional (2D) curved
surfaces has received increasing attention in the past decade. Here, in light of the Huygens …