According to the US "Daily Science" website recently reported that American scientists said that they have developed a new photonic device, which is small enough. Therefore, tens of millions of such photonic devices can be "stacked" on a computer chip. It makes it possible to run supercomputers with faster speeds and stronger information processing capabilities. Related research was published in the journal Science.

Professor Qi Minghao, an assistant professor at the Department of Electronics and Computer Engineering at Purdue University, and the research team led by Professor Andrew Weiler, professor of the Department of Electronic and Computer Engineering at the University, developed the new photonic device, a "passive photodiode." , composed of two silicon rings only 10 microns in diameter, unlike other photodiodes, new photodiodes do not require external assistance to transmit signals, but also can be well integrated into computer chips.

Qi Minghao said that such diodes can perform "non-reciprocal transmission," which means that it only transmits signals in one direction. He explained that the infrared light emitted by the laser is guided through the optical fiber and is guided by a microstructure called a waveguide. Subsequently, it connects through the two silicon rings. Moreover, when it is inside the silicon ring, it experiences "non-linear mutuality. Association." After light enters one of the micro-rings, it either continues to move forward or dissipates backwards, thus achieving one-way transmission. Scientists can also change the wavelengths they transmit by heating them using micro-heaters, thus making it possible to handle waves over a wide frequency range. Qi Minghao said: "One-way transmission is the most basic part of logic circuits. Therefore, our diodes have opened the door for photonic information processing."

Although fiber-optic cables are the basic components for transmitting large amounts of data across seas and continents, optical signals must be converted to electrical signals used in computers or vice versa, and information processing becomes slow and data is Easy to encounter cyber attacks.

Researcher Wang Jian (transliteration) said: "The conversion between optoelectronic signals requires expensive equipment. The new diodes, by abandoning the conversion process, allow the chip to run and process information faster and more securely; it can also be used to manufacture computer chips. The industrial manufacturing process is compatible."

Researchers said that at present, the main factors limiting the development of supercomputers are the operating speed and the bandwidth of individual superchips transmitting information within the system. The new diodes are very compact and have other properties that can be used in future photonic information processing chips, which may result in A supercomputer that runs faster and has more information processing capabilities. Scientists are currently preparing to commercialize it.

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