http://www.cnr.it/ontology/cnr/individuo/prodotto/ID1855

Directionality of acoustic-phonon emission in weakly confined semiconductor quantum dots (Articolo in rivista)

Type

Label

Directionality of acoustic-phonon emission in weakly confined semiconductor quantum dots (Articolo in rivista) (literal)

Anno

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Alternative label

Juan I. Climente and Andrea Bertoni and Guido Goldoni and Elisa Molinari (2007)
Directionality of acoustic-phonon emission in weakly confined semiconductor quantum dots
in Physical review. B, Condensed matter and materials physics
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Juan I. Climente and Andrea Bertoni and Guido Goldoni and Elisa Molinari (literal)

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Rivista

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CNR, INFM, S3, I-41100 Modena, Italy; Univ Modena, Dipartimento Fis, I-41100 Modena, Italy NANO - Istituto Nanoscienze (literal)

Titolo

Directionality of acoustic-phonon emission in weakly confined semiconductor quantum dots (literal)

Abstract

The direction of propagation of acoustic phonons emitted by electron relaxation in weakly confined, parabolic quantum dots charged with one or two electrons is studied theoretically. The emission angle strongly depends on the energy of the phonon, the dominant electron-phonon scattering mechanism (deformation potential or piezoelectric field), and the orbital symmetries of the initial and final electron states. This leads to different behaviors for phonons emitted by electrons relaxing between levels of single and coupled quantum dots. Our results establish the basis to control the direction of propagation of phonon modes triggered by transitions in quantum dot systems. (literal)

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