Chinese scientists have made new progress in the research of transparent electromagnetic devices

Recently, Professor Wu Bian’s team from the Key Laboratory of Antenna and Microwave Technology, School of Electronic Engineering, Xidian University, has made breakthroughs in quasi-one-dimensional surface plasmon optics and RF bitransparent electromagnetic devices, and the research results are based on quasi-one-dimensional surface plasmon Polarition Structures was published in Nature Electronics.

Schematic diagram of quasi-one-dimensional SPPs wireless image transmission system.

In today’s complex electromagnetic environment where various electronic devices coexist, the demand for integrated communication, optical stealth, and electromagnetic stealth is becoming stronger and stronger. Many scenarios (such as 5G/6G communication, smart home, Internet of Things, Internet of Vehicles, solar energy harvesting, etc.) urgently need a series of electromagnetic devices that can provide high optical transmittance, high RF transmittance, and high signal strength. For a long time, the performance of optically transparent devices has relied on transparent conductor materials such as indium tin oxide (ITO), and their own carrier concentration and light transmittance are mutually restricted, with poor light transmission, inability to achieve RF transparency, high processing cost and other defects.

Electromagnetic transmission and radiation devices based on quasi-one-dimensional surface plasmonization lasers. (All photos courtesy of Xidian University)

The research team built a quasi-one-dimensional surface plasmon wireless image transmission system, and conducted data transmission comparison experiments with the traditional ITO wireless image transmission system. Due to the advantages of excellent optical transparency, radio frequency transparency and high radiation efficiency of quasi-one-dimensional SPPs, better image transmission quality is obtained in wireless image transmission. The quasi-one-dimensional surface plasmon structure is expected to construct a series of transport-type and radiation-based transparent electromagnetic devices, and its excellent light transmission characteristics make it almost invisible in the natural environment.

This technology breaks through the optical and RF transmittance limitations of transparent electromagnetic devices, provides new ideas for high light transmission and RF stealth wireless transmission systems, and is expected to be applied to 5G/6G mobile communications, smart homes, Internet of Things and Internet of Vehicles and other highly integrated and covert communication fields. (Source: Yan Tao, China Science News)

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