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Researchers Demonstrate the World's First White Lasers

An anonymous reader writes: Scientists and engineers at Arizona State University, in Tempe, have created the first lasers that can shine light over the full spectrum of visible colors. The device's inventors suggest the laser could find use in video displays, solid-state lighting, and a laser-based version of Wi-Fi. Although previous research has created red, blue, green and other lasers, each of these lasers usually only emitted one color of light. Creating a monolithic structure capable of emitting red, green, and blue all at once has proven difficult because it requires combining very different semiconductors. Growing such mismatched crystals right next to each other often results in fatal defects throughout each of these materials. But now scientists say they've overcome that problem. The heart of the new device is a sheet only nanometers thick made of a semiconducting alloy of zinc, cadmium, sulfur, and selenium. The sheet is divided into different segments. When excited with a pulse of light, the segments rich in cadmium and selenium gave off red light; those rich in cadmium and sulfur emitted green light; and those rich in zinc and sulfur glowed blue.

5 of 118 comments (clear)

  1. What? by Anonymous Coward · · Score: 5, Funny

    It wasn't nanotubes, or 3D printed, or made by Elon Musk??? WTH!?

  2. White! by digsbo · · Score: 4, Funny

    These lasers are oppressing other lasers! They need to check their privilege!

  3. Just what the world needed by SuperKendall · · Score: 3, Funny

    A racist laser, literally white power.

    --
    "There is more worth loving than we have strength to love." - Brian Jay Stanley
  4. And... by WSOGMM · · Score: 3, Funny

    in other related news, researchers tightly focus light bulb light. They contend that their invention should have a wide spectrum of uses, but critics argue that their results aren't coherent.

  5. Re:Even party schools get top notch talent by Applehu+Akbar · · Score: 1, Funny

    But hey, our academics are the best in the world at identity politics technology. Its researchers have added an unprecedented number of new letters and symbols to that gender preference string, making it the DNA of the anti-DNA world.