Unidirectional lasing from InGaN multiple-quantum-well spiral-shaped micropillars by Grace D. Chern, Hakan E. Türeci, A. Douglas Stone, Richard K. Chang, Michael Kneissl, Noble M. Johnson.
We report unidirectional emission from lasing in In0.09Ga0.91N/In0.01Ga0.99N multiple-quantum-well spiral micropillars. Our imaging technique shows that the maximum comes notch of microcavities at an angle about 40° normal notch. At room temperature, microcavity lases near 400 nm when optically pumped with 266 or 355 light. A reduction threshold and improvement unidirectionality occurs is selectively its boundary.
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