Abstract

Laser-assisted atomic layer epitaxy (LALE) is used to locally deposit device-quality material for the first time, as demonstrated by successfully fabricating broad-area lasers with a GaAs quantum well grown in this way. By hybridizing LALE with conventional metalorganic chemical vapor deposition epitaxy, heterostructures are grown which allow characterization of material quality by photoluminescence and capacitance-voltage measurements. In addition, graded-index separate-confinement heterostructure lasers with threshold current densities of 650 A/cm2 for 580-μm-long devices were made using the LALE quantum well deposit, while devices made away from the deposit did not lase.

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