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论文类型：期刊论文

发表时间：2010-10-30

发表刊物：INTERNATIONAL JOURNAL OF MODERN PHYSICS B

收录刊物：SCIE、Scopus

卷号：24

期号：27

页面范围：5469-5474

ISSN号：0217-9792

关键字：Left-handed materials; homogenization; Bruggeman formalism; Wiener bounds; Hashin-Shtrikman bounds

摘要：In the current stage, left-handed material (LHM) has aroused wide interest based on several basic prototypes such as metamaterials. In this work, we have theoretically investigated the possible existence of granular LHM by using the Bruggeman formalism. The Wiener bounds and the Hashin-Shtrikman bounds were invoked and some examples were represented. We had found that when the dissipations are increased adequately, the estimates of the Bruggeman formalism will lie within the two bounds rigorously, even if the two permittivities have real parts of opposite signs. Thus, one particulate LHM may be achieved by choosing the two component mediums with negative permittivity and negative permeability, respectively.