GaN Photonic-Crystal Surface-Emitting Laser at Blue-Violet Wavelengths

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Science  25 Jan 2008:
Vol. 319, Issue 5862, pp. 445-447
DOI: 10.1126/science.1150413

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Shorter-wavelength surface-emitting laser sources are important for a variety of fields, including photonics, information processing, and biology. We report on the creation of a current-driven blue-violet photonic-crystal surface-emitting laser. We have developed a fabrication method, named “air holes retained over growth,” in order to construct a two-dimensional gallium nitride (GaN)/air photonic-crystal structure. The resulting periodic structure has a photonic-crystal band-edge effect sufficient for the successful operation of a current-injection surface-emitting laser. This represents an important step in the development of laser sources that could be focused to a size much less than the wavelength and be integrated two-dimensionally at such short wavelengths.

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