Abstract
Desirable control of optical properties in materials using artificial structures have been explored for
decades since the development of nano- and micro fabrication techniques. While photonic crystals and
plasmonics are the examples of such an approach, new concepts for designing the optically functional
structures are recently arising to show remarkable optical properties that were not accessible before. In
this special issue, recent advancements in these new artificial optical materials ranging from topological
photonics to exotic phase change materials are reviewed, focusing on their designing strategy and
applications.
