2-DIMENSIONAL QUANTUM CONFINEMENT IN MULTIPLE QUANTUM WIRE LASERS GROWN BY OMCVD ON V-GROOVED SUBSTRATES

Structure and lasing characteristics of multiple quantum wire (QWR) GaAs/AlGaAs lasers grown by organometallic chemical vapor deposition (OMCVD) on V-grooved substrates are described. Two 4-QWR laser structures, each with a different wire-size, are compared. Peaks in the amplified spontaneous emission spectra, attributed to enhanced density of states at the QWR subbands, were observed in both structures. Subband separations of 16-20 meV for the smaller wires and 10-14 meV for the larger wires were measured, in agreement with the calculated values based on transmission electron microscopy cross sections of the QWR structures.