Scientists at Boston University have for the first time developed nanowireless optical communication systems that operate in the visible light range. Shorter wavelengths of visible light will greatly reduce the size of computer chips. The core technology of the new system is a nano-antenna that allows photons to move in groups and control the photon and surface plasmons interchangeably. The related papers were published in the Nature Science Report.

According to IEEE Spectroscopy website, this cutting-edge single-channel simultaneous acquisition and transmission of electromagnetic waves is a great challenge, mostly limited to the near-infrared wavelength range, and the new nano-antenna overcomes this obstacle by allowing photons along a single channel. Moving in groups makes it possible to transmit information bidirectionally through a single line of photons.

Michael Lawton, a professor at Boston University who led the research, said that the nano-plasma antennas in the new system can communicate with each other through photons, energy consumption for information transmission between the two antennas is reduced by 50%, and wireless communication efficiency is greatly improved. Building energy efficiency is a big plus.

The data transmission speed of the new nano-antenna is 60% faster than that of the plasmonic waveguide technology and nearly 50% faster than that of the plasma nano-waveguide. The speed is so fast thanks to its key design, the air gap (air gap). The researchers created a small air gap between the light wave and the metal surface by removing a small amount of the glass substrate in the material. This air gap can reduce the material's destructive pull on moving photons. They can also adjust the performance of the antenna by widening or narrowing the air gap.

Researchers have demonstrated that the new nanometer system completely outperforms silicon-based optical waveguide technology in performance. The scattering of light in the silicon-based optical waveguide will reduce the data transmission speed, and not only can the photon propagate in the nano-antenna at the speed of light, but the surface plasma can also propagate at a speed of light near 90% to 95%. "Our new system will become a powerful tool for manufacturing faster silicon-based optical appliances and more efficient communication equipment," said the research postdoctoral Zhuan Mello. (Reporter Nie Cuirong)

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