Electrical pumping is harder than optical.
Current spreading and heating are major issues.
Processing is a pain.
Weak 860 nm and 430 nm pulsed operation demonstrated.
~50 µW average power of 430 nm
Through-the-substrate designs look promising.
Current spreading and heat removal easier.
Requires transparent substrate (see below).
Through-the-substrate VECSELs @ 980 nm and 490 nm
Electrically Injected (IR) - VECSEL Emission (~860nm)
General Design Observations
N on P polarity
Approx. 8 DBR pairs
Oxide Apertures extend beyond metal contacts.
Offset gain and cavity based on drive current and heat sinking.
Electroluminescence Images of 50 micron devices
Typical P on N design (intensity not calibrated)
Points of Contact:
|W. J. Alford||Andy Allerman||Ron Allman||Mike Bannis|
|Weng Chow||Mary Crawford||Peter Esherick||Art Fischer|
|T. D. Raymond||Darwin Serkland||Arlee Smith||Channy Wong|