Multiplying Frequencies with Cadmium Arsenide

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Friday, May 22nd, 2020
Helmholtz-Zentrum Dresden-Rossendorf, Cadmium Arsenide, Nature Communications, Dirac materials, Zhe Wang, Dirac-based components,
Higher frequencies mean faster data transfer and more powerful processors – the formula that has been driving the IT industry for years. Technically, however, it is anything but easy to keep increasing clock rates and radio frequencies. New materials could solve the problem. Experiments at Helmholtz-Zentrum Dresden-Rossendorf (HZDR) have now produced a promising result: An international team of researchers was able to get a novel material to increase the frequency of a terahertz radiation flash by a factor of seven: a first step for potential IT applications, as the group reports in the journal Nature Communications…..
…. the experts used a special process to produce ultra-thin high-purity platelets from cadmium arsenide, which they then subjected to terahertz pulses from the TELBE facility. Detectors behind the back of the platelet recorded how the cadmium arsenide reacted to the radiation pulses. The result: “We were able to show that cadmium arsenide acts as a highly effective frequency multiplier and does not lose its efficiency, not even under the very strong terahertz pulses that can be generated at TELBE,” reports former HZDR researcher Zhe Wang, who now works at the University of Cologne. The experiment was the first ever to demonstrate the phenomenon of terahertz frequency multiplication up to the seventh harmonic in this still young class of materials….
….The phenomenon holds promise for numerous future applications, for example in wireless communication, which trends towards ever higher radio frequencies that can transmit far more data than today’s conventional channels. The industry is currently rolling out the 5G standard. Components made of Dirac materials could one day use even higher frequencies – and thus enable even greater bandwidth than 5G. The new class of materials also seems to be of interest for future computers as Dirac-based components could, in theory, facilitate higher clock rates than today’s silicon-based technologies.
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New Material Acts as an Efficient Frequency Multiplier – May Lead to Faster Data Transfer and More Powerful Processors

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