Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) and Technical University of Vienna (TU Wien) have invented a new type of tunable semiconductor laser that ...

Other rare elements are transforming medicine, too. Gadolinium is used in over a third of all MRI scans. As a contrast agent, ...

Researchers in Germany have developed a ring laser that tracks Earth's axis movements without telescopes or satellites.

Using a tabletop laser, an optical scientist has turned pure aluminum gold. And blue. And gray. And many other colors. And it works for every metal tested, including platinum, titanium, tungsten, ...