Researchers at the University of Innsbruck in Austria have proposed a theory that the heating effect in quantum cascade lasers—semiconductor-based devices that emit infrared radiation—could be reversed through a modification of the thickness of semiconductor layers. The new theory may assist with the development of an internal cooling mechanism for certain types of lasers and … [Read more...]

Researchers at Lehigh and Johns Hopkins Universities have achieved the best ratio to date between opposing types of light-scattering phenomena that occur in semiconducting materials. Yujie Ding, professor of electrical and computer engineering at Lehigh University, suggests that the discovery could lead to smaller, lighter and cheaper communication devices with faster switching … [Read more...]