Design of multichannel electronic wave filters with each channel energy and bandwidth adjustable independently

Abstract

We propose a simple method to design multichannel electron wave filters based on graphene superlattices with one-dimensional periodic potentials, which can choose not only the peak energy of each channel but also the bandwidth independently. This method is described by two samples for the design of two-channel, three-channel filters. Additional defects are introduced symmetrically into the superlattices, then modes are generated, which overlap with the channels that need to tune. These defects make the bandwidth of a certain channel increased without location shifted, while the other channels almost keep constant. The corresponding electronic devices may benefit from this method.