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- W2034194493 abstract "Generation and transport of carriers in strained Si 1- x Ge x /Si quantum well structures were investigated by photoluminescence measurement with varying temperature and excitation power. It was found that the majority of carriers giving luminescence were produced inside the substrate beyond 1 µm and subsequently transported to the quantum wells on the surface side when a visible wavelength excitation source was used. Consequently, the emission of the quantum well closest to the substrate dominated the spectrum under a low excitation condition. In contrast, the emissions of the quantum wells on the surface side were observed at higher temperatures or under intense photopump. The evolution of surface-side quantum well emission is interpreted in terms of carrier escape out of the substrate-side quantum well in the form of either thermal jump to the barrier band-edge or overflow due to population saturation." @default.
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- W2034194493 date "1992-11-01" @default.
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- W2034194493 title "Photogeneration and Transport of Carriers in Strained Si<sub>1-x</sub>Ge<sub>x</sub>/Si Quantum Well Structures" @default.
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