Graphene has long been hailed as a new era of supermaterials.Now, a paper published on September 10th in the international academic journal nature suggests that graphene has added another shining accomplishment.
New experiments show that graphene, as a monolayer of carbon atoms, can convert electronic signals at gigahertz frequencies into higher-frequency terahertz signals.In other words, we will be transmitting 1,000 times more information per second than before.
In general, it is difficult to make waves in the terahertz range.After all, conventional silicon-based electronics have difficulty processing such high-frequency signals.But graphene-based devices can.The researchers say in their paper that these future devices will work much faster than our current devices.
Physicist dmitry et al. from the university of duisburg-essen in Germany tested graphene's ability to produce terahertz by injecting a layer of atom-thick material with 300 GHZ radiation.When these waves hit graphene, the electrons in the material heated up quickly and then cooled, releasing up to seven times the frequency of the incoming radiation.
"This is another amazing result for graphene," said scherff, a physicist at the university of Ottawa.Before that, graphene, a two-dimensional material already known as a supermaterial because of its extraordinary ability to carry out superconductivity under certain conditions, allowing electrons to pass freely and unimpeded.
In this experiment, the graphene material converted 1/1000h, 1/10,000th and 1/10,000th of the original 300 GHZ signal into waves of 0.9, 1.5 and 2.1 terahertz.These conversion rates may look small, but they are already very high for single atoms, says physicist nozaki ozaki of Quebec city's national institute of science.
Graphene-based computer components will be able to work at terahertz, which will be used in very advanced high-performance computers.Graphene could also be used to make extremely high-speed nano-devices.