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(a) 5 × 5 μm2 AFM image and (b) bright-field PV-TEM image of the InAs0.72P0.28 cap grown on an InAsxP1−x metamorphic step-graded buffer.
(a) InAs0.94P0.06 MQW sample structure, (b) ω-2Θ (004) HRXRD scan (black) and RADS simulation results (red), and (c) cross-sectional TEM image of five periods of MQW region and graded InAs0.78P0.22 cap.
PL spectra from the MQW sample showing 2.54 μm and 2.83 μm peak emission at 78 K and 300 K, respectively.
(a) Calculated QW energy band alignment and (b) T-dependent PL results showing experimental ground-state peak energies (black squares), Varshni fit (black line), and calculated peak energies (red crosses).
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