High Performance Graphene Photodetectors Set Speed Record for Data Transmission
Graphene is an ideal material for optical communications systems. A new, waveguide-integrated photodetector from AMO, Germany sets a record high bandwidth for ultrafast, high data rate graphene devices.
Graphene-based technologies are proving integral to the new generation of communications – enabling high performance optical communication systems through ultra-fast and compact optoelectronic devices. Researchers from the Graphene Flagship working at TU Vienna, Austria and AMO, Germany, have demonstrated ultrafast photodetectors that have the highest reported bandwidth for graphene-based devices, enabling data rates of up to 100 Gbit/s.
The research, recently published in Nano Letters, points the way towards graphene applications in high-speed communications systems.
Graphene’s properties make it ideal for next-generation optoelectronics and optical communications systems. Its excellent electrical properties and broadband optical absorption are highly suited for high-performance optoelectronic devices, and it can be readily integrated with silicon photonic systems. The photodetector demonstrated here is highly sensitive, due to its very compact structure. This enables the use of such detectors alongside other opto-electronic devices including switches in functionally dense, integrated chips. “This could open the path towards a complete integration on one CMOS chip. Graphene will be the enabling material for realising high performance photodetectors on a silicon platform,” added Schuler.
Speaking about this new photodetector design, another of the paper’s authors, Daniel Neumaier of AMO, Germany said “This is an important step towards high performance on-chip photo-detectors, demonstrating that competitive speed and sensitivity can be achieved in graphene photodetectors in a highly controlled way.” On-chip integration of different graphene-enable technologies is an important focus of the Graphene Flagship. Neumaier leads the Graphene Flagship Electronics and Photonics Integration Division and Work Package Electronic Devices, and is a member of the Flagship Management Panel and Executive Board
Andrea Ferrari, Science and Technology Officer of the Graphene Flagship and Chair of its Management Panel, stated “Graphene photonics and optoelectronics is clearly one of the strongest areas for mid-term development. The Graphene Flagship has made significant investment in pioneering large scale integration of optoelectronic components based on graphene and related materials. This is a key step to enable their widespread uptake in the future of data com and IoT areas. This result clearly shows that we are on the right track on our technology roadmap”
Contacts and sources:
Graphene Flagship
Citation: Controlled Generation of a p–n Junction in a Waveguide Integrated Graphene Photodetector, Simone Schuler, Daniel Schall, Daniel Neumaier, Lukas Dobusch, Ole Bethge, Benedikt Schwarz, Michael Krall,Thomas Mueller, Nano Letters, 2016, 16 (11), pp 7107–7112DOI: 10.1021/acs.nanolett.6b03374
Source: http://www.ineffableisland.com/2016/12/high-performance-graphene.html
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