WASHINGTON — Researchers have designed and demonstrated two all-silicon terahertz metasurface devices that can be used to create four optical channels for simultaneously implementing different optical ...

Since its invention over 25 years ago, the scanning tunnelling microscope (STM) has been regularly used to image and manipulate surface species. Martin Wenderoth of the University of Göttingen and ...

The Fermi surface of a crystalline solid is the boundary between states that are occupied by electrons at absolute zero temperature and states that are empty at this temperature. It is usually ...