Monolithic Sb-based vertical cavity surface emitting lasers (VCSELs) o
perating near 2.2 mu m at room temperature have been successfully fabr
icated and characterised. A pulsed output optical power of 20mW has be
en achieved, the threshold current density being 2kA/cm(2) for 200 mu
m diameter devices. The entire structure was grown in a single growth
run using molecular beam epitaxy.