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Gómez, I. ; Domínguez-Adame Acosta, Francisco ; Díez, E. ; Bellani, V. | American Institute of Physics | 1999-04-01We study the electron transmission probability in semiconductor superlattices where the height of the barriers is modulated by a Gaussian profile. Such structures act as efficient energy band-pass filters and, contrary to previous designs, it is[...]texto impreso
Parisini, A. ; Tarricone, L. ; Bellani, V. ; Parravicini, G. B. ; Díaz García, Elena ; Domínguez-Adame Acosta, Francisco ; Hey, R. | American Physical Society | 2001-01-15We report a systematic study of several GaAs-AlxGa1-xAs semiconductor superlattices grown by molecular-beam epitaxy specifically designed to explore the existence of extended states in random dimer superlattices. We have confirmed our previous r[...]texto impreso
Bellani, V. ; Parravicini, G. B. ; Díez, E. ; Domínguez-Adame Acosta, Francisco ; Hey, R. | American Physical Society | 2002-11-15We studied the optical properties of ordered and intentionally disordered GaAs-AlxGa1-xAs superlattices, with and without dimer-type correlations in the disorder, by means of spectroscopic ellipsometry. The electronic structure of the superlatti[...]texto impreso
Bellani, V. ; Díez, E. ; Hey, R. ; Toni, L. ; Tarricone, L. ; Parravicini, G.B. ; Domínguez-Adame Acosta, Francisco ; Gómez-Alcalá, R. | American Physical Society | 1999-03-08We study the electronic properties of GaAs-AlGaAs superlattices with intentional correlated disorder by means of photoluminescence and vertical de resistance. The results are compared to those obtained in ordered and uncorrelated disordered supe[...]
