Breaking News
Research

APIC announces Ge laser, photonic IC to follow

2/23/2012 10:57 AM EST
2 comments
NO RATINGS
More Related Links
View Comments: Newest First | Oldest First | Threaded View
goafrit
User Rank
Author
re: APIC announces Ge laser, photonic IC to follow
goafrit   2/24/2012 4:34:57 PM
NO RATINGS
Impressive. This is Nature type of research. With the intrinsic quality of Ge, a new dawn may be here.

gronk
User Rank
Author
re: APIC announces Ge laser, photonic IC to follow
gronk   2/24/2012 3:10:26 PM
NO RATINGS
Link to MIT professor's explanation: http://web.mit.edu/newsoffice/2010/first-germanium-laser.html Basically, they dope the conduction band so heavily that the direct-gap minimum falls under the Fermi level, too. Then you have a reservoir of electrons to do direct-gap transitions. It sounds, though, like you still have a lot of electrons in indirect-gap minimum making transitions -- i.e., heat. I wonder how much current is required to pump this thing and how much heat is dissipated, if in fact many more electrons are making the indirect transition than the direct one?

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed