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|Type:||Artigo de periódico|
|Title:||A Photomodulated Spectroscopy Study Of Inxga1-xas/ Gaas Superlattices And Quantum Wells|
|Abstract:||We present here a detailed study of photomodulated transmission and reflectivity at room and liquid-nitrogen temperatures of a series of In xGa1-xAs/GaAs superlattices and a single quantum well. Our samples span a variety of alloy compositions and quantum-well widths. We compare the results of our measurements with the predictions of an envelope-function calculation, which includes wave-vector dependence of the minibands. This comparison allows identification of several spectral features unmistakably arising from miniband dispersion. Also, accurate determination is made of the band-offset parameter, whose value is discussed in the context of those obtained by other authors.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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