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Sharp enters the non-polar GaN fray

The leading diode laser and consumer electronics manufacturer is hoping to push GaN lasers to longer wavelengths for color display applications.

The field of non-polar GaN lasers, currently dominated by Rohm Corporation and the University of California, Santa Barbara, now has another big player in the shape of Sharp Corporation.

This firm s researchers, like the other groups, have turned to this material to avoid built-in polarization fields found in conventional c-plane GaN. These fields reduce laser output efficiency and shorten emission wavelengths, in a blue-shift effect that worsens at higher injection currents.

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