Stop Gaps and Single Defect States of Acoustic Waves in Two-Dimensional Lattice of Liquid Cylinders
WU Fu-Gen1,2, LIU Zheng-You1, LIU You-Yan1
1Department of Applied Physics, South China University of Technology, Guangzhou 510641
2Department of Applied Physics, Guangdong University of Technology, Guangzhou 510090
Stop Gaps and Single Defect States of Acoustic Waves in Two-Dimensional Lattice of Liquid Cylinders
WU Fu-Gen1,2;LIU Zheng-You1;LIU You-Yan1
1Department of Applied Physics, South China University of Technology, Guangzhou 510641
2Department of Applied Physics, Guangdong University of Technology, Guangzhou 510090
Abstract： The acoustic wave band structures and single defect states of the two-dimensional periodic composite media of water (mercury)cylinders with circular cross section in mercury (water) host was studied by using the plane-waves method and supercell calculations. We find that the numbers of the gaps in the first 50 bands vs filling fraction have the similar results as gap/midgap ratio of the lowest gap in the period systems. Only one band gap exhibits in wide range of filling fraction, and several defect states are created inside the band gaps in single defect system. The influences of filling fraction and defect radius on the band structure are investigated.
(Velocity and attenuation of elastic and poroelastic waves)
引用本文:
WU Fu-Gen;LIU Zheng-You;LIU You-Yan. Stop Gaps and Single Defect States of Acoustic Waves in Two-Dimensional Lattice of Liquid Cylinders[J]. 中国物理快报, 2001, 18(6): 785-787.
WU Fu-Gen, LIU Zheng-You, LIU You-Yan. Stop Gaps and Single Defect States of Acoustic Waves in Two-Dimensional Lattice of Liquid Cylinders. Chin. Phys. Lett., 2001, 18(6): 785-787.
2001, Vol. 18 
