Low threshold MBE-grown AlInGaAs-AlGaAs strained multiquantum-well lasers by rapid thermal annealing

Abstract

With post-growth rapid thermal annealing (RTA), 818 nm strained Al/sub 0.15/In/sub 0.25/Ga/sub 0.6/As multiquantum-well (MQW) lasers grown by solid source molecular beam epitaxy (MBE) showed a record low threshold current density of 83 A/cm/sup 2/ per well. Ridge waveguide lasers fabricated from the same material exhibited pulsed threshold current of 5 mA with 62% differential quantum efficiency.