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Aug 28, 2024

Tiny new lasers fill a long-standing gap in the rainbow of visible-light colors, opening new applications

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It’s not easy making green. For years, scientists have fabricated small, high-quality lasers that generate red and blue light. However, the method they typically employ—injecting electric current into semiconductors—hasn’t worked as well in building tiny lasers that emit light at yellow and green wavelengths.

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