News tagged with energy state

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

Topological light: Living on the edge

(Phys.org) —Topology—the understanding of how things are connected—remains abstract, even with the popular example of doughnuts and coffee cups. This concept, esoteric as it appears, is also neat because ...

Oct 21, 2013
5 / 5 (9) 1 | with audio podcast