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Top view of the Yokohama group’s nano laser.
Top view of the Yokohama group’s nanolaser, in which the center narrow slot (horizontal line) is the main part of the sensor. The periodic holes form a photonic crystal, and although the size of the holes appears to fluctuate they’ve been intentionally modified so the laser’s emission is effectively extracted to the top. Image: Toshihiko Baba/Yokohama National University.
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