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 …

The geometric phase concept has profound implications in many branches of physics, from
condensed matter physics to quantum systems. Although geometric phase has a long …

Abstract Recently discovered reflective Pancharatnam–Berry phase (PB phase) from chiral
anisotropic media (eg, cholesteric liquid crystal, CLC) has aroused great interest in the …

Although the photonic spin‐Hall effect (PSHE) at optical interfaces has been widely studied
in past years, its physical origin remains obscure. Here, through studying the scatterings of …

Thermal emission from a hot body is inherently challenging to control due to its incoherent
nature. Recent advances have shown that patterned surfaces can transform thermal …

Electromagnetic wave multiplexing, especially for that occurring at different incidences
(spatial-frequency multiplexing), is pivotal for ultrathin multifunctional interfaces and high …

Two-dimensional chiral metasurfaces seem to contradict Lord Kelvin's geometric definition
of chirality since they can be made to coincide by performing rotational operations …

Metasurfaces have enabled the realization of several optical functionalities over an ultrathin
platform, fostering the exciting field of flat optics. Traditional metasurfaces are achieved by …

Here we present a roadmap on Photonic metasurfaces. This document consists of a number
of perspective articles on different applications, challenge areas or technologies underlying …

Geometric phases are ubiquitous in physics; they act as memories of the transformation of a
physical system. In optics, the most prominent examples are the Pancharatnam-Berry phase …