Nonlocal effective medium analysis in symmetric metal-dielectric multilayer metamaterials

Lei Sun, Zhigang Li, Ting S. Luk, Xiaodong Yang, Jie Gao
2015 Physical Review B  
The optical nonlocality in symmetric metal-dielectric multilayer metamaterials is theoretically and experimentally investigated with respect to the TM-polarized incident light. A new nonlocal effective medium theory is derived from the transfer-matrix method to determine the nonlocal effective permittivity depending on both frequency and wave vector in the symmetric metal-dielectric multilayer stack. In contrast to the local effective medium theory, our proposed nonlocal effective medium theory
more » ... ctive medium theory can accurately predict the measured incident angle-dependent reflection spectra from the fabricated multilayer stack and provide nonlocal dispersion relations. Moreover, the bulk plasmon polaritons with large wave vectors supported in the multilayer stack are also investigated with the nonlocal effective medium theory through the analysis of dispersion relation and eigenmode.
doi:10.1103/physrevb.91.195147 fatcat:kqc2gbjr7na33khdmtaryok3ay