Manipulation of extinction features in frequency combs through the usage of graphene

Abstract

Lately, the integration of bidimensional materials into semiconductor devices has allowed the modification of their effective index by simply applying a modest voltage (between 0 and 2 volts). In this work, we present a device composed of two evanescently coupled silicon microring resonators where both rings have a graphene layer on top. This design is aimed to produce frequency combs with transmission characteristics controlled upon voltage application to the graphene layer.