Resumen
The dependence of the imaginary part of the dielectric function on the quantum confinement within two different schemes: intra-atomic and interatomic optical matrix elements are applied and compared. The optical spectra of Si nanowires are studied by means of a semi-empirical sp3s* tight-binding supercell model. The surface dangling bonds are passivated by hydrogen atoms. The results show that although the intra-atomic matrix elements are small in magnitude, the interference between these terms and the interatomic matrix elements contributes with nearly 25% of the total absorption. Thus, a quantitative treatment of nanostructures may not be possible without the inclusion of intra-atomic matrix elements.
Idioma original | Inglés |
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Páginas (desde-hasta) | 456-458 |
Número de páginas | 3 |
Publicación | Microelectronics Journal |
Volumen | 40 |
N.º | 3 |
DOI | |
Estado | Publicada - mar. 2009 |