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- W2092148865 abstract "The photoluminescence (PL) wavelength of high-purity 0.5-μm-thick metalorganic vapor-phase epitaxy In1−xGaxAs/InP was measured at room temperature (RT) as a function of composition. The relaxed mismatch of these coherently strained layers was between −0.25% and +0.13%, corresponding to x=0.503 – 0.448. The composition was determined by x-ray diffraction (XRD) using a four-crystal monochromator. Extremely narrow XRD linewidths as a function of layer thickness are reported. The PL peak wavelength λp at RT of exactly lattice-matched InGaAs is 1668 nm, corresponding to a band gap Eg=731 meV. The bowing parameter of the strain-free Eg(x) relation is c=−0.494. The measured λp vs x relation agrees well with the strain-free Eg(x) corrected by the hydrostatic part of the strain energy. From line-shape analysis of RT and 77 K PL spectra it is found that the spectra of strained layers contain two lines in accordance with the valence band splitting under uniaxial strain. The conditions for a reliable determination of the compositional homogeneity of large InGaAs wafers by a mapping of λp are given; e.g., a variation Δx=8.7×10−3 over a 2 in. wafer is found." @default.
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- W2092148865 date "1993-05-01" @default.
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- W2092148865 title "Relation between photoluminescence wavelength and lattice mismatch in metalorganic vapor‐phase epitaxy InGaAs/InP" @default.
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- W2092148865 doi "https://doi.org/10.1063/1.352751" @default.
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