We describe gas-source molecular beam epitaxy (MBE) and luminescence characterization of strain Si1-xGex/Si quantum wells (QWs). Successful and reproducible growth of strained QWs is demonstrated, addressing the significance of selecting a higher growth temperature to establish a high degree of structural integrity and to maintain the crystallinity in terms of "optical" quality. Excellent heterointerface transcience was evidenced by an almost perfect match between the spectral shift due to exciton confinement and the theoretical calculation. A good spatial uniformity in terms of well width and composition was obtained when QWs are grown in the adsorption/dissociation-limited growth regime.
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