The development of photodiodes in the UK will have a heavy impact on the photonics industry.
According to Reuters, the physicist organizational network reported on March 16 that researchers at the British National Physical Laboratory (NPL) have developed a full-LED diode. This new diode is expected to revolutionize micro-photonic circuits and nanophotonics chips by offering an inexpensive and efficient solution with significant potential in fields like photonic chips and photonics.
Xiao Yunfeng, a researcher at the Institute of Modern Optics, Peking University, explained to a reporter from Science and Technology Daily: "Diodes allow current to flow in one direction while blocking it in the reverse. They are fundamental components in most electronic circuits. However, existing optical diodes are large and rely on magneto-optical crystals, which greatly limits their integration at the micro and nano scale. This has become a major challenge in integrated photonics."
In the latest study, led by Dr. Pascal Del Haier, the team introduced light into a microresonator—a glass microring on a silicon chip. Though the diameter of the microring is about the same as a human hair, it allows light to circulate back and forth inside. By utilizing the micro-ring-enhanced optical Kerr effect, they created a new all-optical diode. This device only allows light to pass in one direction and can be integrated into micro-nano photonic circuits, overcoming the need for bulky magneto-optical crystals.
Del Haier emphasized: "These diodes are expected to provide cost-effective and efficient photodiodes for low-light chips. They could also pave the way for new integrated photonic circuits applicable in optical computing and may significantly impact future photonic communication systems."
Chinese scientists have also made notable progress in this field. For instance, Dr. Dong Chunhua from the University of Science and Technology of China used microcavity light interaction to develop a non-reciprocal microcavity device, including all-optical diodes and circulators, all controlled by light.
Xiao Yunfeng added: "Although this is not the first all-optical diode, the device we obtained has simple operation and high isolation, making it a promising solution. However, similar to other all-optical diode designs, cavity-based ones often face bandwidth limitations and operate within narrow resonant modes. Further research is needed to overcome these challenges."
Editor: Yan Zhixiang
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