Title :
Complete phononic bandgaps and bandgap maps in two-dimensional silicon phononic crystal plates
Author :
Mohammadi, S. ; Eftekhar, A.A. ; Khelif, A. ; Moubchir, H. ; Westafer, R. ; Hunt, W.D. ; Adibi, A.
Author_Institution :
Georgia Inst. of Technol., Atlanta
Abstract :
It is shown that it is possible to obtain complete planar phononic bandgaps in square and hexagonal (honeycomb) lattice phononic crystals formed by etching a periodic array of circular holes in a thin silicon plate (or membrane). Also, better bandgap properties are obtained using the hexagonal lattice structure; and, with practical structure sizes, it is possible-to-obtain a gap-to-midgap ratio of 18-35%.
Keywords :
elemental semiconductors; energy gap; phononic crystals; silicon; 2D phononic crystal plates; Si; band gap map; phononic band gap;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20071159
