Optical transmission through metal/dielectric multilayer films perforated with periodic subwavelength slits

✍ Scribed by Dong Xiang; Ling-Ling Wang; Xiang Zhai; Liu Wang; An-Lian Pan

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 961 KB
• Volume: 284
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2010.08.023

✦ Synopsis

The transmission of p-polarized plane wave through Ag/SiO 2 multilayer films perforated with periodic subwavelength air slits is investigated by using the finite-difference time-domain (FDTD) method. The results show that the optical transmission property is mediated by the interference among the propagating coupled-SPP modes along the lateral direction inside the SiO 2 layers and the conditions of Fabry-Pérot-like resonance along the longitudinal direction together. When some geometric parameters are suitably initialized, the high transmission peaks can split into more peaks as the functional layer (metal/dielectric/metal sandwich stack) number increases, and the wavelength of the same-order transmission peak exhibits a red shift as the grating period increases.