Articles you may be interested inSolid source molecular beam epitaxy of low threshold 1.55 μm wavelength GaInAs/GaInAsP/InP semiconductor lasers J.Effect of interface defect formation on carrier diffusion and luminescence in In0.2Ga0.8As/Al x Ga1−x As quantum wells All solid source molecular beam epitaxy growth and characterization of strain-compensated 1.3 μm InAsP/InGaP/InP multiquantum well lasers for high-temperature operation InP-based high-electron mobility transistor ͑HEMT͒ structures have been grown containing strained In 1Ϫx Al x P Schottky layers with xϭ0.15-0.25. The band gaps of the strained layers in the HEMT structure were determined by photoreflectance spectroscopy. For xϭ0.15, Hall mobilities were comparable to those obtained in an analogous InAlAs/InGaAs structure. Lower mobilities were obtained with higher x value. Misfit dislocations were observed in plan view transmission electron microscopy for xϭ0.25 but not xϭ0.15. HEMT structures were also grown with InAsP channel layers containing moderate sheet densities. Photoluminescence measurements of the quantum well region indicated transitions to two electronic subbands. The InAs 1Ϫx P x composition was found to be weakly dependent on the phosphorus flux and uniform on 2 in. wafers.