Succeeded in developing semiconductors that output "white lasers" that enable ultra-high speed communication of Pbps (petabit per second)

"White lasers" which are created by gathering lasers of different wavelengths are expected to be useful for high-efficiency lighting and ultra high-speed communication. America's researchers have succeeded in the world for the first time in the demonstration of generating the white laser with a single semiconductor.

(PDF file)A moolithic white laser - nature nanotechnology

ASU researchers demonstrate the world's first white lasers
https://asunews.asu.edu/20150728-worlds-first-white-laser

Light (electromagnetic waves) highly directional "laser"Although it is used in various fields such as medical equipment, optical equipment and communication light source, white lasers which can combine lasers of different wavelengths are more efficient lighting than LED, display backlight and about 1000 Since it enables petabit communication which is twice the communication speed, the development of a light source that can produce white laser is under way.

Various methods have been developed to create white lasers by combining lasers of different wavelengths, that is, different colors, but creating a white laser with a single semiconductor without using multiple light sources is difficult to produce white It is considered to be an indispensable task for application and dissemination of laser technology.


Meanwhile, researchers at Arizona State University succeeded in producing the world's first white laser with a single laser semiconductor, and the results were published in scientific journalsNature nanotechnologyIt is announced in.

Arizona State University'sPerseveranceProfessor 's research team,CVDThree laser semiconductors that output red, green, and blue lasers using a special nanosheet with a thin layer of 1 / 1000th of the hair using parallelHeterojunctionI did.


Combining the red laser light source (T3), the blue laser light source (T1) and the green laser light source (T2) succeeded in creating a white laser with the frequency of "P3123" in the lower graph. The wavelength of the laser light can be adjusted, and it has also succeeded in producing 70% of the wavelength already used for general display.


However, since a white laser semiconductor produced by Professor Yu et al. Needs a separate laser light source to emit electrons to excite electrons in the semiconductor in order to output a white laser, toward realization of a white laser light source , Ultimately aiming at the development of semiconductors that can produce white lasers with only electricity without additional lasers.