Graphene-based reconfigurable transmission filter near the wavelength of 1.55 μm

A reconfigurable transmission filter operating at the wavelength 1.55 μm and based on graphene is presented and discussed. The presented structure consists of Bragg mirrors and Fibonacci quasi-periodic structures where a graphene layer is intercalated at each interface. It is shown that the variation of the Fermi level in graphene allows the adjustment of the filter resonance wavelength. We show how this property makes it possible to compensate for the offsets of the resonance peak induced by an eventual error on the thickness of the dielectric layers composing the structure. The calculations made show that graphene act as a phase-shifter which can tune the wavelength of the resonance peak about 6 nm on both sides of the working wavelength, and also improve the transmission of the structure.