Inside of a laser cavity showing a red ruby crystal surrounded by a glass spiral. Some circuitry brings current to the glass spiral which excites the ruby crystal to produce red laser light escaping the cavity.
Happy #InternationalDayofLight2025 everyone! ππ₯³π¬
To celebrate #IDOL2025, we decided to gather all our #Primers on light-based technologies in a Collection. Can you guess why the celebration happens on this day? The Collection's cover gives you a hintπ
ππ www.nature.com/collections/...
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