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Nature 406, 132-135 (13 July 2000) | doi:10.1038/35018184

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Laser physics: The smallest random laser

Diederik Wiersma

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Smaller laser sources could be used in all-optical devices or for secret marking of documents. A special type of microlaser that uses disordered materials to create laser light may provide a simple and cheap option.

How small can you make a light source? A common light bulb is a few centimetres in diameter.