Ultra-fast detection of light lies at the heart of optical communication systems nowadays. Driven by the internet of things and 5G, data communication bandwidth is growing exponentially, thus requiring even faster optical detectors that can be integrated into photonic circuits.
In the recent work published today in Nature Nanotechnology, the research group led by Prof at ICFO Frank Koppens has shown that a two-dimensional crystal, combined with graphene, has the capability to detect optical pulses with a response faster than ten picoseconds, while maintaining a high efficiency.
By using ultra-fast laser pulses, the researchers have shown a record-high photo-response speed for a heterostructure made of two-dimensional materials. These new materials are gaining more and more attention due to their amazing and rich variety of properties.
An important advantage of these devices based on graphene and other two-dimensional materials is that they can be integrated monolithically with silicon photonics enabling a new class of photonic integrated circuits.
Although this study has been focused on the intrinsic properties of the photo-detection device, the next step is to develop prototype photonic circuitry and explore ways to improve large-scale production of these devices.
While Prof. Frank Koppens comments "It is remarkable how a material which is just a few nanometers thick can have such high performance", ICFO researcher Mathieu Massicotte and first author of this study states that "Everyone knew graphene could make ultrafast photodetectors, but related two-dimensional crystals were still lagging very much behind. In our work we show that by teaming up these two materials, we can obtain a photodetector that is not only ultrafast but also highly efficient."
The results obtained from this study have shown that the stacking of semiconducting 2D materials with graphene in heterostructures could lead to new, fast and efficient optoelectronic applications, such as high-speed integrated communication systems.
This study has been possible thanks to the support of the Fundació Cellex Barcelona, the European Research Council (ERC) and the EC under the Graphene Flagship, among others.
ICFO-The Institute of Photonic Sciences is a center of research excellence devoted to the science and technologies of light with a triple mission: to conduct frontier research, train the next generation of scientists, and provide knowledge and technology transfer.
Research at ICFO targets the forefront of science and technology based on light with programs directed at applications in Health, Renewable Energies, Information Technologies, Security and Industrial processes, among others. The institute hosts 300 professionals based in a dedicated building situated in the Mediterranean Technology Park in the metropolitan area of Barcelona.
ICFO participates in a large number of projects and international networks of excellence and is host to the NEST program financed by the Fundació Privada Cellex Barcelona. ICFO is a member of the Severo Ochoa Excelence program and a member of The Barcelona Institute of Science and Technology.
Picosecond photoresponse in van der Waals heterostructures
M. Massicotte, P. Schmidt, F. Vialla, K. G. Schädler, A. Reserbat-Plantey, K. Watanabe, T. Taniguchi, K. J. Tielrooij and F. H. L. Koppens
Link to the paper: http://www.
Link to the research group led by Prof. at ICFO Frank Koppens: https:/
Link to "Research @ICFO" video of the research carried out by the group led by Prof. Frank Koppens: https:/
Alina Hirschmann | EurekAlert!
Powerful IT security for the car of the future – research alliance develops new approaches
25.05.2018 | Universität Ulm
Supercomputing the emergence of material behavior
18.05.2018 | University of Texas at Austin, Texas Advanced Computing Center
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences