Knots are everywhere—from tangled headphones to DNA strands packed inside viruses—but how an isolated filament can knot ...

When black holes collide, the impact radiates into space like the sound of a bell in the form of gravitational waves. But ...

Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts ...

Condensed-matter physics is the study of substances in their solid state. This includes the investigation of both crystalline solids in which the atoms are positioned on a repeating three-dimensional ...

Abstract: Metasurfaces have attracted extensive attention due to their excellent capabilities in wavefront manipulation. However, chromatic aberration, which is widely present in phase-modulated ...

Abstract: Smith-Purcell radiation (SPR), which occurs when electrons traverse a diffraction grating, is a promising candidate for tunable terahertz sources. Recent advancements in enhancing ...