Room temperature (RT) continuous-wave (CW) operation of vertical-cavity sur
face-emitting lasers (VCSELs) with GaAsSb quantum wells on GaAs substrates
has been demonstrated. A 6 x 6 mu m(2) oxide-confined device exhibited RT-C
W lasing with a threshold current of 0.7mA at 1.23 mu m, which is the longe
st reported wavelength of GaAs-based VCSELs yet reported.