A general model for analysis of acoustic ...
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
A general model for analysis of acoustic phonons in piezoelectric super-lattices. Application to the (111)-AlAs/GaAs super-lattice
Auteur(s) :
Zhang, Victor [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Djafari-Rouhani, Bahram [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Djafari-Rouhani, Bahram [Auteur]
Titre de la revue :
Journal of Physics: Condensed Matter
Pagination :
186209-1-17
Éditeur :
IOP Publishing
Date de publication :
2007
ISSN :
0953-8984
Discipline(s) HAL :
Sciences de l'ingénieur [physics]
Résumé en anglais : [en]
A general model is established for the analysis of acoustic phonons in an arbitrarily oriented piezoelectric super-lattice (SL). Analytical expressions are derived allowing the dispersion relation, transmission (T) and ...
Lire la suite >A general model is established for the analysis of acoustic phonons in an arbitrarily oriented piezoelectric super-lattice (SL). Analytical expressions are derived allowing the dispersion relation, transmission (T) and reflection (R) properties of the phonons to be numerically calculated for any incidence angle. Numerical investigation is exemplified for the (111) GaAs/AlAs SL with incidence in the plane. The obtained band structures confirm that the stop bands for both the shear horizontal and the coupled longitudinal and shear phonons appear inside the folded Brillouin zone, contrary to the (100) SL case in which they appear at the zone centre and edges. Both classical dispersion curves and Floquet slowness diagrams are used to present the edges of the Brillouin zones. Locations and widths of the stop bands inside the folded zones, as well as the T and R rates taking into account mode conversion, are studied as a function of frequency and incidence angle.Lire moins >
Lire la suite >A general model is established for the analysis of acoustic phonons in an arbitrarily oriented piezoelectric super-lattice (SL). Analytical expressions are derived allowing the dispersion relation, transmission (T) and reflection (R) properties of the phonons to be numerically calculated for any incidence angle. Numerical investigation is exemplified for the (111) GaAs/AlAs SL with incidence in the plane. The obtained band structures confirm that the stop bands for both the shear horizontal and the coupled longitudinal and shear phonons appear inside the folded Brillouin zone, contrary to the (100) SL case in which they appear at the zone centre and edges. Both classical dispersion curves and Floquet slowness diagrams are used to present the edges of the Brillouin zones. Locations and widths of the stop bands inside the folded zones, as well as the T and R rates taking into account mode conversion, are studied as a function of frequency and incidence angle.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :