Propagation and Localization of Light in One-Dimensional Nonlinear Photonic Crystals Embedded Polyvinylidene Fluoride /Graphene Oxide Layers

Abstract

Propagation and localization of light in one-dimensional nonlinear photonic crystals (1D-NPhCs) are analyzed in this paper, which consist of alternating layers with varying dielectric constants. The nonlinear dielectric layers are composed of polyvinylidene fluoride (PVDF)/graphene oxide (GO), which act as a defect and are embedded between two types of linear dielectric layers, enabling manipulation of their optical susceptibility. The definitions, classifications, and the optimal structure are provided, as well as formulas for transmittance and reflectance with the transmission matrix method (TMM). The defect layer of PVDF/GO enhances the localization capability of the electric field of light, while the stacking orders and symmetry determine transmission or reflectance at the specified wavelength or frequency. The translational symmetric structure, particularly those with single and double layers of PVDF/GO, exhibit high transmittance (0.99 and 0.62, respectively). In contrast, mirror symmetric and other asymmetric structures have broad bandgaps, with the maximum bandwidth reaching 87.5THz. The 1D-NPhCs with PVDF/GO could provide a potential solution for improving optical filtering and limiting devices in the future.

Keywords: Localization, Nonlinear photonic crystals, Propagation, transmittance, electric field, Stacking orders