Us to solve laser short board research and development, based on LED ultra fast WiFi

Science and Technology Daily News, since the advent of the last century in 60s, the laser has been in many fields "show their talents", but it has always been a short board, that is, can only send a single wavelength of light. Now, scientists in the United States have solved the problem. They have developed a laser that can emit white light for the first time. White light lasers are brighter and more energy efficient than light-emitting diodes (LED), and will play an important role in lighting and wireless communications, researchers said.

A team led by Ning Cunzheng of the school of electronic, computer and energy engineering at the Arizona State University developed a new kind of nanosheets. This thin semiconductor size is only 1/5 of the hair, hair thickness is only 1/1000 of the thickness, which has three parallel parts, each part of the laser can emit a color red, blue and green colors in the. The whole device emits all visible lasers, from red to green, to blue, or any color between them, and when the primary colors meet, white lasers appear.

The latest research makes laser replacement LED become mainstream light source, a step forward. Lasers are brighter, more energy efficient, and provide more accurate and vivid display colors that can be used on computers and television screens. The researchers also confirmed that their new device could produce more than 70% of the industry's current display standards.

Another important application of the research will be the field of visible light communications, future indoor lighting systems, or communications. Scientists are now developing the technology called Li-Fi, which is visible light wireless communications, using fast light pulses to wirelessly transmit information. The current Wi-Fi uses radio waves. Li-Fi can be 10 times faster than Wi-Fi, while white laser Wi-Fi may be 10 to 100 times larger than the LED based Li-Fi currently under development.

Although this concept is very important, it is still a big obstacle to apply this white light laser to real-life lighting or display systems. The next key, researchers say, is to get the same white laser under the battery's drive. As far as the demonstration is concerned, researchers must use a laser to give electrons light. The latest experiments will pave the way for eventual white laser capture under electrical operation.

Chief editor punctuate

White light laser is not a new born baby. It is very useful in color display, special lighting, surgical diagnosis and white light interference experiment. But a monolithic white light laser has never been invented. Once upon a time, the solution to this problem was to generate primary colors with several separate lasers. A laser can simultaneously output RGB colors, reducing unnecessary large device, eliminating the need for the light coaxial difficulties, and save the cost. Although there is still some distance between this device and its actual application, the first successful verification concept remains to be reckoned with.

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