Graphene is a single atomic layer of carbon atoms that form a honeycomb network. It is found for example in graphite, the main constituent of pencil rods. In the Department of Quantum Matter Physics of UNIGE’s Faculty of Sciences, Alexey Kuzmenko’s team has been working on graphene’s physical properties for several years.
Working within the framework of the European project Graphene Flagship, scientists have made a graphene-based transistor adapted to terahertz waves. “By combining the electrical field, which enables us to control the number of electrons in graphene and thus allows more or less light to pass through, with the magnetic field, which bends the electronic orbits, we have been able to control not just the intensity of the terahertz waves, but also their polarisation,” comments Jean-Marie Poumirol, a member of the UNIGE research team and the first author of the study.
Practical applications of terahertz waves
Today, the UNIGE research team’s focus is to move on from the prototype, and develop practical applications and new opportunities by controlling terahertz waves. Their objective is to make terahertz waves industrially competitive in the next few years. There are two main areas of application for this innovation, the first being communications.
Contacts and sources:
Université de Genève (University of Geneva)