期刊
APPLIED PHYSICS LETTERS
卷 83, 期 9, 页码 1710-1712出版社
AMER INST PHYSICS
DOI: 10.1063/1.1605792
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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 emission comes from the notch of the spiral microcavities at an angle about 40degrees from the normal of the notch. At room temperature, the spiral microcavity lases near 400 nm when optically pumped with 266 or 355 nm light. A reduction in the lasing threshold and an improvement in unidirectionality occurs when the microcavity is selectively pumped near its boundary. (C) 2003 American Institute of Physics.
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