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  • Cool temperatures and tech

     Japo_Japo updated 2 months, 2 weeks ago 1 Member · 1 Post
  • Japo_Japo

    Member
    September 10, 2021 at 3:09 am

    The current polariton laser can run only at a chilly 4 degrees Kelvin (minus 452 degrees Fahrenheit) and requires constant cooling by liquid helium to prevent the excitons inside the gallium arsenide semiconductors from being pulled apart by thermal energy.

    The team hopes switching to a material that requires more energy to break apart excitons will allow them to build polariton lasers that work at room temperature, an important step toward widespread use.

    “We’re hoping we can replace conventional semiconductor lasers with these polariton lasers in the future,” Kim said. “There are a lot of hurdles in the way, but we aim to bring novel devices built on sound physical understanding for cost-effectiveness and efficient power consumption.”

    The polariton laser is already being utilized by Stanford researchers developing quantum computers and quantum simulators. Kim believes similar lasers will be available to those outside the scientific community within the next five to 10 years.

    The research was supported by the National Science Foundation, the DARPA QUEST program, the Japan Society for the Promotion of Science through its “Funding Program for World-Leading Innovation R&D on Science and Technology (FIRST Program) and the State of Bavaria.

    Publication: Christian Schneider, et al., “An electrically pumped polariton laser,” Nature 497, 348–352, (16 May 2013); doi:10.1038/nature12036

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