Research NewsPhysics

Microwaves Steal the Blush From Ruby

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Science  15 Aug 1997:
Vol. 277, Issue 5328, pp. 899-900
DOI: 10.1126/science.277.5328.899

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Rubies are red, and they usually stay that way. But a team of electrical engineers made rubies slightly more transparent with a technique called electromagnetically induced transparency. Never before demonstrated in a solid, the technique uses a microwave field to put a lock on the electrons that normally absorb light, a feat that could lead to switches for optical computers and lower powered lasers.