New technology can pull semiconductors into fiber diodes

According to a recent report by the American Physicists Organization Network, diodes are the core component in modern electronic devices. Researchers at MIT have successfully manufactured a fine fiber with diode functions and provided a way to pull ordinary spin semiconductor materials. The fiber-forming process technology is expected to open up a new manufacturing method for future high-precision electronic equipment and photonic equipment. The research was published in the Proceedings of the National Academy of Sciences recently published.

New materials drawn into composite fibers

At present, in the field of broadband communications, most optical fibers are produced using fiber drawing technology, but these technologies will be limited by materials. Only at the appropriate temperature can the materials used be drawn into silk. The new research shows how to synthesize new materials into composite fibers during the drawing process, including those with high melting points.

The researchers explained that it is necessary to prepare a rough preform before drawing, such as a larger glass rod, similar to the extra large model of the produced fiber. Heat the preform to make it soft and sticky like toffee, and then pull it into fibers. Although the size of the material is greatly reduced compared to the pre-finished product, the composition remains unchanged. The pre-products they used contained selenium, sulfur, zinc and tin, and they were also intended to be coated with a polymer material. The drawing process was completed at 260 degrees Celsius, and the fibers formed by combining these materials contained zinc selenide, which The melting point of this compound is as high as 1530 degrees Celsius, and it has very important electrical and optical properties. A composite fiber containing zinc selenide can act as a photonic circuit, just like the electron flow in a traditional circuit, except that the electron is replaced by a beam of light.

The co-author of the thesis, postdoctoral researcher at MIT, Nicholas Orff, said that all previous methods of fiber drawing have no effect on the new materials they use. Only with new methods can new materials be drawn into shape. The final fiber is very simple, but it has the function of a diode semiconductor device and can only conduct electricity in one direction. Previous diodes could not be manufactured in this way.

Ove said the research also showed that other materials that had never been considered before could also be used to combine the drawn fibers. Because the physical structure of the fiber material is the same as in the pre-finished product, we will eventually hope to use the structure of these fibers to combine more and more complex circuits. This fiber can be used as a sensor in light, temperature or other environments, and can also be used for textiles, such as fabrics for solar cells.

Take an important step towards "all-round fiber"

The new research started with the most basic question of "how fine can a fiber be". Jor Fink, who led the research, said that in recent decades, people have made great progress in manufacturing various forms of electronic equipment, but there are few in terms of overall functionality, fiber accuracy and weaving technology. Progress is still in the form of human early invention. New research is expected to make fiber drawing a great way to synthesize new materials.

The researchers have created 15 different types of fiber diode devices. If further research is "possible to get hundreds more", they can finally connect them to form circuits.

Professor John Barreto, Director of the Center for Optical Materials Science and Engineering Technology at Clemson University, added: "Recently people have begun to pay attention to the potential applications of semiconductor optical fibers. It combines the advantages of optoelectronics and semiconductors. Materials that will usually not be directly woven It is made into a fabric so that the fiber can also be used as a miniature solid-state chemical reactor. This also creates more opportunities, which can be regarded as an important step towards "all-round fiber", which can generate, propagate, sense and control photons, Electronics and phonons. "

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