Successfully fabricated white laser, will replace LED and WiFi waves

Scientists invented the laser in the 1960s but could not produce a white laser.

Scientists have built a white laser

Recently, researchers at the University of Arizona, USA announced they have created a device for white laser emission . With this achievement, they said that in the future white laser will replace LED because of its higher lighting capacity, more energy saving, more colorful and even white laser will replace the wave. WIFI.

Scientists have used nanosheet technology to create a super-thin semiconductor layer, about one-fifth the size of a human hair and only 1/1000 the thickness of a human hair. With 3 layers in parallel, laser beams with 3 basic colors are red, green and blue. These three colors, when combined, will create a laser with any color visible to the human eye, including white lasers.

The group's study was published July 27 in Nature Nanotechnology with the title " A monolithic white laser ". Professor Cun-Zheng Ning and his doctoral students are Fan Fan, Sunay Turkdogan, Zhicheng Liu and David Shelhammer to participate in the study of this project. The invention of the white laser helped Liu and Turkdogan to complete his doctoral thesis.

3 layers of semiconductor laser white regeneration

Scientists believe that the introduction of white lasers will help replace LED bulbs, thanks to their higher illumination , reproducing any color desired, (Professor Ning says the white laser application will create renewable screens that are more colorful than 70% LEDs, but also thanks to higher power efficiency than LEDs.

White lasers also pave the way for Li-Fi (Light-based Wifi), which is used to develop technology that uses lasers to replace wifi waves , which is 10 times faster. In the future, the laser light in your room will also be the wifi transmitter.

Dr. Fan Fan said that the team wanted to improve the technology to create a layer of transistors emitting 3 green, red and blue lasers at the same time, instead of the current three layers, but technology currently has not been done. They said it took up to two years for the team to make the nanosheet semiconductor layer emitting blue lasers .

Previously, the 2014 Nobel Prize for physics was awarded to three Japanese scientists who invented a blue LED (extremely important in combination with red LED and green LED to produce white LED ), so the invention of white laser will certainly have great significance in future science and technology.

We can hope that in the future, the laser lamp in the room will replace the wifi transmitter, and the white laser will open the door to manufacture high-tech devices such as televisions, lights, routers. .