Scatterings
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The ultimate in small lasers.
A cw photonic crystal nanolaser has a lasing threshold of only 1.2 mW and a modal volume of 0.028 µm3.
Using slight defects engineered into a photonic crystal, researchers created the ultimate in small lasers, with a cavity mode volume of only 0.019 µm3—close to the diffraction limit of light. Kengo Nozaki, Shota Kita and Toshihiko Baba at Yokohama National University in Japan built a room-temperature continuous GaInAsP laser that operates on only a microwatt of power (Opt. Express 15, 7506).
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