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 ...

When it comes to gold, beauty and weight are two sides of the same coin. As nice as it looks in a watch or ring, pure gold would get too heavy for everyday wear, so it’s often lightened up with alloys ...

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, ...

Gold has a lot of pretty cool industrial applications. NASA uses it to protect astronauts from cosmic radiation by lining the visors of their space helmets. Commercial electronics also use gold to ...

Physicists have discovered that self-focused laser pulses generate violent swirls of optical energy that resemble smoke rings. In these light structures, known as 'spatiotemporal optical vortices,' ...