Photonic band gap structure and transmissivity of frequency-dependent metallic-dielectric systems

The complex photonic band gap (PBG) structure of frequency-dependent metall ic-dielectric systems, using actual measured values for index of refraction , has been computed using nonlinear numerical techniques. Transmissivity an d reflectivity were also computed and compared with the PBG structure. For application to PBG systems consisting of alternate layers of Ag and MgF2 ov er a range of frequencies from the near ultraviolet to the near infrared, w e find that features of the PBG structure, transmissivity, and reflectivity are distinctly different from those computed using the Drude model. These features include plasma resonant structure not included in the Drude model. (C) 2000 American Institute of Physics. [S0021-8979(00)00419-9].