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Tuesday, 23 April 2019

Graphene enables a new technology for detecting terahertz radiation

A recent study in Nano Letters depicts a device that overcomes the several disadvantages related to current terahertz detectors. ICN2 Junior Group Leader Dr Klaas-Jan Tielrooij, who was involved in this work while still performing his research at ICFO, is one of the corresponding authors.

The detection of light at terahertz (THz) frequencies is important for a large range of applications, such as airport scanners or wireless data communication. However, current detectors typically have several disadvantages in terms of sensitivity, speed, operating temperature and spectral range.

In a recent article published in Nano Letters, ICFO researchers Sebastián Castilla and Dr Bernat Terrés, led by ICREA Prof. at ICFO Frank Koppens and former ICFO scientist Dr Klaas-Jan Tielrooij (now Junior Group Leader at the ICN2 Ultrafast Dynamics in Nanoscale Systems Group), have been able to overcome these challenges. The work was performed in collaboration with scientists from CIC NanoGUNE, NEST (CNR), Nanjing University, Donostia International Physics Center, University of Ioannina and the National Institute for Material Sciences. They have developed a new graphene-enabled photodetector that operates at room temperature, and is highly sensitive, very fast, has a wide dynamic range and covers a broad range of THz frequencies. In summary, it is better than what is now commercially available.

To know more about this research you can visit the news at ICFO’s webpage.