Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1863013 | Physics Letters A | 2008 | 5 Pages |
Abstract
We present studies on the optical properties of periodic metallic-dielectric (MD) multilayers and numerical results show that there exists, insensitive to the lattice scaling, a transparent band as long as the layer thickness is in the subwavelength ranging. It illustrates the transparent band is controlled by mechanisms beyond the Bragg scattering: the shorter-wavelength band edge comes from the intensive resonant absorption behavior of the metals, while the longer-wavelength band edge is determined by zero (volume) averaged permittivity εeff=0. Moreover, a Lorentz-Drude model for the permittivity of a ε-negative (ENG) metamaterial is used to show that a transparent band may be obtained in a subwavelength structure consisting of ENG multilayers with total length less than both the center wavelength and the half width of the band.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Guiqiang Du, Zhanshan Wang, Hongqiang Li, Yewen Zhang, Hong Chen,