Dirac electrons were predicted by P. Dirac and discovered by A. Geim, both of whom were awarded the Nobel Prize in Physics in 1933 and in 2010, respectively. Dirac electrons behave like photons rather ...

Within our comfortable world of causality we expect that reactions always follow an action and not vice versa. This why the recent chatter in the media about researchers having discovered ‘negative ...

A closed door feels absolute. Light stays in one room, darkness settles in the next, and the boundary seems obvious enough to ...

Over the past decade, researchers have become good at creating devices that emit single photons on demand, which is a key ingredient for quantum computing. However, reliably producing exactly two ...

Ultrafast lasers tracked plasma formation and ionization in copper with picosecond precision. Results show rapid ion growth ...

A new theoretical study finds shorter laser pulses achieve higher quantum efficiency for photoemission from a solid surface ...

Controlled generation of single-photon emitters in silicon (red) by broad-beam implantation of ions (blue) through a lithographically defined mask (left) and by a scanned focused ion beam (right).

The photoelectric effect is a phenomenon where light knocks electrons out of a material, resulting in the emission of these electrons, called photoelectrons. Albert Einstein explained the ...