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Photonic crystal lasers move into the blue

A short wavelength surface-emitting laser could help Japanese researchers to develop next-generation information storage devices.

Researchers in Japan have for the first time produced a photonic crystal surface-emitting laser (PC-SEL) that emits in the blue-violet wavelength range. They claim that their innovative fabrication method is an important step in the development of laser sources that can be focused to a spot much less than the emitted wavelength. (Science Express 10.1126/science.1150413)

"We have succeeded in developing a new method in the GaN system resulting in a current-driven PC-SEL that emits at a peak wavelength of 406.5 nm," Susuma Noda, a researcher from Kyoto University, told optics.org. "PC-SELs operating at blue-violet wavelengths could find uses in a variety of new areas including next-generation information storage and micro- to nano-operation in biological or medical fields."

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