Light transfer characteristics of MoS2/metal one-dimensional photonic crystals

Abstract

We present a study of the optical propagation properties of one-dimensional (1D) MoS2/metal photonic crystals (PCs) formed by periodic stacking of alternating MoS2 and metal layers in ambient air atmosphere. The propagation properties of light moving in such a structure are solved using the transfer matrix method. The optical properties of the MoS2/metal PCs are obtained analytically as a function of the materials used, the thicknesses of the layers, and the number of units. Among Ag, Al, Ni, and Fe, Ag was the most suitable metal for constructing PCs in the visible light range. The transmission spectra of the MoS2/Ag PCs exhibited periodic oscillation, with 1, 2 photonic band gaps (PBGs) in the 400–800 nm range when the thickness of the Ag film was 1–2 nm, and the optimum number of periodic units, N, was 10-20. Beyond this range, the transmittance of the structures monotonically decreased with increasing wavelength. The periodic oscillation properties of transmittance in MoS2/Ag 1D PCs can be used in sensors and detectors and as real-time monitors for biological and medical technology fields.