LED-pumped luminescent concentrators, a new source of amplification stimulating maser microwave emission, combine power and brightness
"masers detect/ amplify extremely weak electromagnetic signals without adding additional noise... overcomes: complex, expensive, very cold/ vacuum, high magnetic field fabrication conditions... replacing complex laser systems with low-cost energy-efficient LEDs operable at room temperature... compact, scalable, integrateable into: quantum technologies, deep-space communications, portable sensing devices including body scanners such as those used at airports"
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