A group of researchers at the University of Chalmers in Sweden have developed, for the first time, a flexible terahertz detector using graphene transistors on plastic material substrates. The development can be used in applications that require flexible electronics, sensor networks and wearable devices.
Terahertz radiation is defined as electromagnetic waves with frequencies ranging from 1,000 gigahertz to 10 terahertz. Until now terahertz detectors, and devices of these frequencies in general, were difficult to build for simple applications mainly because of the weight of the devices.
Now Xinxin Yang, Andrei Vorobiev, Andrey Generalov, Michael A. Andersson and Jan Stake, all Chalmers researchers, with the help of advances in polymer technology, have the first ever flexible terahertz detector. The detector has unique features:
- At room temperature, it detects signals in the frequency range 330 to 500 gigahertz.
- It is translucent and flexible.
- It is open to a variety of applications including IoT sensors, healthcare, imaging sensors for connected vehicles and wireless communication in general.
The results of the research were published last week in the Applied Physics Letter journal and ccan be read here.
Watch a video distributed by Chalmers University here.