James M. Gaines

Room‐temperature photopumped blue lasing in ZnSe‐ZnS0.06Se0.94 double heterostructures

We present results on room‐temperature photopumped lasing action in the blue region (∼4650 A) of the spectrum for double heterostructures with ZnSe active layers. The confining layers are ZnS0.06Se0.94, providing lattice match to the GaAs substrate. The room‐temperature lasing, observed under pulsed excitation, yields threshold pump intensity as low as 58 kW cm−2 for an active layer thickness of 1500 A.

Blue-Green Injection Lasers Operating at Temperatures up to 394K

Recent results on blue-green injection lasers containing ZnprMl5rSySer_y cladding layers are presented. The lasers are separate-confinement heterosuucnues with a ZnSs.06Ses.94 waveguiding rcgion and a single %.zh.sSe strained quantum well. The devices have yielded threshold curent densities as low as 500 Ncrr2 e20 Ncr2 with facet coating) and pulsed output poweru as high as 500 mW per facet at room temperarure. The lasers have operated at temperatures as high as 394K. CW operation, for a few seconds, was observed at 77K. Emission spectroscopy measurements of the thermal properties are also presented.