Double heterostructures ͑DHs͒ consisting of BeZnSeTe active and MgSe/BeZnTe superlattice cladding layers were fabricated on InP substrates by molecular beam epitaxy. By photoexciting the DHs, green lasing emissions at 548 nm were obtained at room temperature. The threshold excitation power density was 70 kW/ cm 2 , from which we estimated the threshold carrier density and threshold current density assuming a green laser diode ͑LD͒ with a BeZnSeTe active layer to be ͑1.4-4.6͒ ϫ 10 18 cm −3 and 0.22-0.73 kA/ cm 2 , respectively. The experiment proved the applicability of BeZnSeTe as an active layer of green LDs.

No abstract

No abstract

No abstract