A general model for analysis of acoustic ...
Document type :
Compte-rendu et recension critique d'ouvrage
Title :
A general model for analysis of acoustic phonons in piezoelectric super-lattices. Application to the (111)-AlAs/GaAs super-lattice
Author(s) :
Zhang, Victor [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Djafari-Rouhani, Bahram [Auteur]
![refId](/themes/Mirage2//images/idref.png)
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Djafari-Rouhani, Bahram [Auteur]
![refId](/themes/Mirage2//images/idref.png)
Journal title :
Journal of Physics: Condensed Matter
Pages :
186209-1-17
Publisher :
IOP Publishing
Publication date :
2007
ISSN :
0953-8984
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [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 ...
Show more >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.Show less >
Show more >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.Show less >
Language :
Anglais
Popular science :
Non
Source :