According to foreign media reports, British researchers have developed the world's leading composite semiconductor (CS) technology, which can support future high-speed data communications. A team of researchers at Cardiff University's Institute for Compound Semiconductors (ICS) in collaboration with others has created an ultra-fast, highly sensitive avalanche photodiode (APD) that produces Electronic "noise" is smaller than other silicon competitors.
APD is a particularly sensitive semiconductor device that uses the "photoelectric effect" (produced when light is irradiated to a material) and can convert light into electricity. Faster, super-sensitive APDs are needed around the world for high-speed data communication applications and light detection and ranging (lidar) systems for autonomous vehicles.
Cardiff University researchers led by Diana Huffaker, Professor of Advanced Materials and Equipment Ser Cymru Research Group, Scientific Director of ICS, Senior Engineering and Materials Chairman of Ser Cymru Research Group, and the University of Sheffield, University of California Los Angeles The California NanoSystems Institute at the campus collaborated to develop the technology.
Professor Huffaker said: "Our research is to develop an avalanche photodiode with ultra-low additional noise and high sensitivity, which makes it a high-performance receiver for network and sensing applications. The innovation of this technology Is to use molecular beam epitaxy (MBE) to "grow" compound semiconductor crystals between atoms to develop advanced materials. Such materials combine four different atoms and require a new MBE method, which is quite complicated and difficult Synthesis. However, the researchers designed the Ser Cymru MBE device into a series of materials that can be used in future sensing solutions. "
Dr. Shiyu Xie, co-founder of Ser Cymru MBE equipment, said: "Our developed APD can work in a room temperature environment with very low signal, and it is very important to be compatible with the InP photoelectric platform currently used by most commercial communication providers This type of APD can be used in a wide range of applications. In Lidar or 3D laser imaging applications, APD can generate high-precision maps; in addition, it can also be used in some control and navigation applications in geomorphology, seismology, and autonomous vehicles. Our research can change the global APD research, and the materials we develop can directly replace the existing APD, produce higher data transmission rates, or achieve longer transmission distances. "
Professor Huffaker added: "Our research can produce direct benefits for the industry. At present, we are working with Airbus and Compound Semiconductor Applications Catapult to apply this technology to future free-space optoelectronic communication systems."
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