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- W2002136196 abstract "Abstract The (Al 1− x Ga x ) 0.5 In 0.5 P/InAs system has a large band discontinuity and is expected to improve the characteristic temperature of QD lasers by embedding InAs-QD in GaInP. We investigated the QD density and size of InAs-QD deposited on GaInP with various growth conditions, namely InAs growth temperature ( T s =450–500°C) and As-flux (3×10 −7 –6×10 −6 mbar) by AFM measurement, and we compared the temperature characteristics of InAs-QD embedded in GaInP with InGaAs-QW in GaInP, InGaAs-QW in GaAs and InAs-QD in GaAs by PL measurement at 10–380 K. The size and total volume of InAs-QD on GaInP increased according to the rise in growth temperature and As-flux, although the amount of deposited InAs was constant. This means that a considerable amount of In was supplied for the QD layer from the GaInP matrix and this was enhanced by the growth temperture and As-flux. Comparing the integrated PL intensity with GaAs/InAs-QD, it was shown that no obvious decline of PL intensity of GaInP/InAs-QD was observed up to around 200 K, though in GaAs/InAs-QD, it began to fall from around 50 K. Moreover, even when comparing with GaAs/InGaAs-QW, the integrated intensity of GaInP/InAs-QD became superior to that of GaAs/InGaAs-QW above room temperature. This result demonstrates that embedding InAs-QD in the GaInP matrix is considerably effective in improving the temperature characteristic of InAs-QD." @default.
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- W2002136196 date "2003-04-01" @default.
- W2002136196 modified "2023-09-23" @default.
- W2002136196 title "Growth and temperature characteristic of self-assembled InAs-QD on GaInP" @default.
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- W2002136196 doi "https://doi.org/10.1016/s0022-0248(02)02426-0" @default.
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