Enhanced Bandwidth Graphene Electro-Optic Modulator at Cryogenic Temperatures

This study presents a high-bandwidth graphene electro-optic modulator operating at a cryogenic temperature of 4.9 K. The investigation reveals a notable increase in graphene mobility at lower temperatures, resulting in reduced device resistance and consequently enhanced RC-limited bandwidth of the graphene modulators. The improved performance at cryogenic temperatures highlights the potential of graphene-based devices for high-speed optical communication applications.