Scientists create world’s first white laser

White laser beam.
Google.
According to a study published in Nature magazine,
scientists at Arizona State University have created a
white laser beam, the world’s first.
White lasers hold a few potential benefits such as
a
light source for gadget screens as they are more
energy efficient than LEDs currently in use. They also
can be used in Li-Fi, a developing technology that uses
multiple colors of light to enable high-speed wireless
internet access.
Past years, lasers have been able to emit every single
wavelength of light asides white. Typical lasers only
beam one specific wavelength of light at a time. To
create white, the researchers manufactured three thin
semiconductor lasers — each as thick as one-
thousandth of a human hair — and lined them up
parallel to one another. Each semiconductor emits one
of the three primary colors and are then combined
together to form white. This way the device can also be
tuned to create any color in the visible spectrum.
The technology is not ready for commercial or
consumer use yet but the researchers are trying to
make it work on battery power.