期刊
PHYSICS LETTERS A
卷 327, 期 2-3, 页码 247-253出版社
ELSEVIER
DOI: 10.1016/j.physleta.2004.05.030
关键词
phononic crystal; convergence problem
A new formulation of eigenproblem for phononic crystals is developed. The convergence of the new formulation in the band-structure calculations is examined in detail and compared with that of the conventional plane wave expansion (CPWE) method. Numerical results show that the slow convergence of the CPWE method is not due to the slow convergence of the Fourier series for the elastic coefficients (or displacement fields) in the interfaces of different materials, but to the inappropriate formulation of the eigenproblem used in the calculations. Numerical calculations also show that the new formulation can provide much more accurate numerical results than the CPWE method for the systems of either very high or very low filling fractions, or of large elastic mismatch. (C) 2004 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据