News tagged with energy states

Tunable quantum cascade laser

(PhysOrg.com) -- One of the issues associated with lasers is their tunability. In many cases, if you want to produce a particular wavelength, you have to build a laser to accomplish this. In order to get another wavelength, ...

Jul 07, 2010 feature
4.6 / 5 (20) 1 | with audio podcast

Graphene can emit laser flashes

Graphene is considered the jack-of-all-trades of materials science: The two-dimensional honeycomb-shaped lattice made up of carbon atoms is stronger than steel and exhibits extremely high charge carrier mobilities. ...

Oct 25, 2013
5 / 5 (17) 0 | with audio podcast

Improvement of superconductors within reach

An international group of physicists from the University of Augsburg in Germany, the University of Florida in Gainesville, and the Niels Bohr Institute at the University of Copenhagen have succeeded in creating ...

Jul 09, 2010
4.5 / 5 (17) 7 | with audio podcast

Climate warnings ignored with US elections looming

The U.S. Congress, ignoring dire new warnings about climate change, continues to shy away from legislation that might mitigate the effects of global warming, leaving President Barack Obama with limited tools to reduce greenhouse ...

May 15, 2014
3.9 / 5 (18) 69