Graphene Devices for Mastering Terahertz Waves Developed
The terahertz waves span frequency ranges between the infrared spectrum (used, for example, for night vision) and gigahertz waves (which find their application, among other, in Wi-Fi connections). Terahertz waves allow for the detection of materials that are undetectable at other frequencies. However, the use of these waves is severely limited by the absence of suitable devices and materials allowing to control them.
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)
Source: http://www.ineffableisland.com/2017/03/graphene-devices-for-mastering.html
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