United States to solve the development of laser short board based on LED ultra fast WiFi

Science and Technology Daily News, since the advent of the 60s of last century, the laser has been in a number of areas to show their talents, but it has been a short board, that is, only a single wavelength of light. Now, scientists in the United States have solved this problem, and for the first time, they have developed a laser capable of emitting white light. The researchers said that white light emitting diode (LED) brighter and more efficient, the future will play an important role in the field of lighting and wireless communications.

A team of researchers led by Ning Cunzheng, from the Arizona State University's School of electronics, computer and energy engineering, developed a novel nano sheet. 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 entire device can emit all visible light laser, from red to green to blue, or any color between the two, when the primary colors "meet", there is a white laser.

The latest research has made it a step forward for the laser to replace LED as the main light source. The laser is brighter, more energy efficient and provides a more accurate and vivid display of colors that can be used on computers and TV screens. The researchers also confirmed that their new device can produce more than 70% of the current industry standard color display.

Another important application of the study will be the field of visible light communications, future indoor lighting systems or communications. Scientists are currently developing a technology called "Li-Fi" (that is, visible light wireless communications, the use of fast optical pulse wireless transmission of information). And now the "Wi-Fi" is the use of radio waves. The speed of Li-Fi can reach 10 times more than Wi-Fi, while the white laser Wi-Fi may be currently being developed based on the LED of the Li-Fi of 10 to 100 times.

Although this concept is very important, but in order to put this white light laser applications in real life lighting or display system, but also faces great obstacles. The next key, researchers say, is to get the same white laser on the battery. As far as the current demonstration is concerned, researchers must use a laser to make the electrons glow. The latest experiment will pave the way for the final white laser in electrical operation.

Chief editor punctuate

White light laser is not a newborn, it is very useful in color display, special lighting, surgical diagnosis and white light interference experiment. But a "monolithic" white light laser has not been invented. Once upon a time, the only way to solve this problem was to use several independent lasers to produce primary colors. 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 the device and the actual application, but the concept of success is still not the first verification.

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