Strategy for designing broadband epsilon-near-zero metamaterials
Publication in refereed journal

香港中文大學研究人員

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摘要A strategy is proposed to design a certain kind of metamaterial with near-zero electric permittivity over a broad frequency band, i.e., the broadband epsilon-near-zero (ENZ) metamaterials. Based on the Bergman-Milton spectral representation of the effective permittivity, the design is first carried out in the dimensionless spectral space, where the effective permittivity of the ENZ metamaterials is mathematically determined by a series of zeros and poles (singularities), which can be easily arranged as required by the operating band. Then, through a fast inverse algorithm, the mathematical structures of the ENZ metamaterials can be transformed back to their physical structures, which can be put into practical applications. The effective permittivity of the designed ENZ metamaterials is examined, and the distribution of the electric field inside the designed ENZ metamaterials is also explored, in order to reveal the physical reason behind the broadband ENZ phenomenon. (C) 2012 Optical Society of America
著者Sun L, Yu KW
期刊名稱Journal of the Optical Society of America B
出版年份2012
月份5
日期1
卷號29
期次5
出版社OPTICAL SOC AMER
頁次984 - 989
國際標準期刊號0740-3224
語言英式英語
Web of Science 學科類別Optics; OPTICS

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