"No one has been able to create a laser that beams white light."

Arizona State University creates first white laser

#Technology

Fri, Jul 31st, 2015 10:00 by capnasty NEWS

The Arizona State University (ASU) reports that it has successfully created a white laser, a long-time puzzle for researchers. White lasers, which are more powerful and energy efficient than LEDs, could change the "future of lighting and light-based communication."

The researchers have created a novel nanosheet – a thin layer of semiconductor that measures roughly one-fifth of the thickness of human hair in size with a thickness that is roughly one-thousandth of the thickness of human hair – with three parallel segments, each supporting laser action in one of three elementary colors. The device is capable of lasing in any visible color, completely tunable from red, green to blue, or any color in between. When the total field is collected, a white color emerges.

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