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Resonant raman scattering in CdSxSe1-x nanocrystals : effects of phonon confine...
Freitas Neto, E. S.; Silva, S. W. da; Morais, P. C.; Vasilevskiy, Mikhail; Silva, M. A. Pereira da; Dantas, N. O.Optical phonon modes confined in CdSxSe1-x nanocrystal (NC) quantum dots (≈ 2 nm in radius) grown in a glass matrix by the melting-nucleation method, were studied by means of resonant Raman scattering (RRS)spectroscopy and theoretical modelling. The formation of nanocrystalline quantum dots (QDs) is evidenced by the observation of absorption peaks and theoretically expected resonance bands in the RRS excitation...
Ambipolar carrier diffusion in In0.53Ga0.47As single quantum wells
Monte,A.F.G.; Silva,S.W. da; Cruz,J.M.R.; Morais,P.C.; Cox,H.M.The microluminescence surface scan technique (MSST) has been used to investigate photocarrier diffusion in undoped In0.53Ga0.47 As - InP single quantum well (QW), in the temperature (T) range from 15 K to 295 K. Narrowing of the photoluminescence (PL) spatial profile is observed as the temperature is lowered, indicating reduction of the photocarrier diffusion length upon cooling. It was found that the width of ...
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