DocumentCode
1956067
Title
Material loss effect on the dispersion of Bloch waves in phononic crystals
Author
Moiseyenko, Rayisa P. ; Laude, Vincent
Author_Institution
CNRS, Univ. de Franche-Comte, Besancon, France
fYear
2010
fDate
11-14 Oct. 2010
Firstpage
1857
Lastpage
1860
Abstract
Phononic crystals composed of lossy materials with viscosity constants proportional to the frequency are considered. Complex band structures are computed for such crystals using an extended plane wave expansion method. The effect of losses on both the real and the imaginary part of Bloch waves is investigated in the case of a two-dimensional square-lattice phononic crystal of holes in silicon. It is in particular found that losses limit the appearance of large group slownesses, or conversely small group velocities.
Keywords
APW calculations; absorbing media; acoustic dispersion; elemental semiconductors; energy gap; phononic crystals; silicon; viscoelasticity; viscosity; Bloch wave dispersion; Si; band gap; complex band structures; conversely small group velocities; extended plane wave expansion method; group slownesses; lossy materials; material loss effect; silicon holes; two-dimensional square-lattice phononic crystal; viscoelasticity; viscosity constants; Acoustics; Crystals; Photonic band gap; Scattering; Silicon; Viscosity;
fLanguage
English
Publisher
ieee
Conference_Titel
Ultrasonics Symposium (IUS), 2010 IEEE
Conference_Location
San Diego, CA
ISSN
1948-5719
Print_ISBN
978-1-4577-0382-9
Type
conf
DOI
10.1109/ULTSYM.2010.5935652
Filename
5935652
Link To Document