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Room-temperature PL from five-stack samples with 2, 4, 6, and 8 MLs of GaP SC layer.
(Color online) AFM images showing the top layer of a three stack (a) without SC, and (b) with SC and a five stack (c) without SC, and (d) with SC.
RTPL spectra comparing single to four-stack QD active regions (a) with SC and (b) without SC layers.
characteristic and lasing spectra for a three-stack QD laser with 4 ML GaP SC layers.
Tabulated AFM data from samples in Fig. 2 including dot density, defect density, and dot size for a single layer, three-stack, and five-stack active region with and without GaP SC layers.
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