Amplifying and compressing optical filter based on one-dimensional ternary photonic crystal structure containing gain medium

The transmission spectrum properties of the one-dimensional ternary pholonic crystal (1DTPC) structure, composed of dielectric (D), metal (M) and gain (G) materials, with three different at of (DGM)(N), (GDM)(N) and (DMG)(N), where N is the number of periodicity, were investigated. Two full photonic band gaps and N - 1 resonant peaks, localized between them, were observed on transmittance spectra on near-UV spectrum region. When the gained layer was placed in front of the metal, the peaks appeared with higher resolution. There is a peak, localized on the higher band-edge of the first gap, which shows very interesting property than the other peaks. Thus, it amplifies and compresses faster with increase in the N and strength of the gain coefficient. The effects of the gain coefficient and periodicity number are graphically illustrated. This communication presents a PC structure that can be a good candidate to design an amplifying and compressing single or multi-channel optical filler in the UV region. (C) 2015 Elsevier B.V. All rights reserved