Electrical engineers in Bochum have succeeded in developing a new concept for ultrafast semiconductor lasers. The researchers make clever use of the intrinsic angular momentum of electrons, called spin, to successfully break the previous speed barriers. The new spin lasers have the potential to achieve modulation frequencies of well above 100 GHz in future. This …
Electrical implants that shut down excessive activity in brain cells hold great potential for treating epilepsy and chronic pain. Likewise, devices that enhance neurons’ activity may help restore function to people with nerve damage. A new technology developed at MIT and Harvard Medical School may overcome the primary drawback to this approach, known as functional …
Daniel Nocera and his fellow researchers today claimed one of the milestones in the drive for sustainable energy — development of the first practical artificial leaf. Speaking here at the 241st National Meeting of the American Chemical Society, they described an advanced solar cell the size of a poker card that mimics the process, called …
Schematic drawing of the surface reconstruction in Ca(CoxFe1-x)2As2. The circles indicate the As position, the gray lines indicate the surface reconstruction lines seen in the topographic images. For better visibility, we don’t include possible surface dimerization (31) in this drawing. The black rectangle marks the orthorhombic unit cell with lattice parameters as reported by Ref. …