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Birefringence of GaN/AlGaN optical waveguides
Hui, Rongqing Wan, Yueting Li, Jilu Jin, Sixuan Lin, J. Y. Jiang, Hongxing
Hui, Rongqing
Wan, Yueting
Li, Jilu
Jin, Sixuan
Lin, J. Y.
Jiang, Hongxing
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Abstract
We have experimentally studied the birefringence of wurtzite GaNgrown on a sapphire substrate. The measurements were done with single-mode GaN/AlGaN planar optical waveguides on c-plane grownheterostructure films. The refractive indices were found to be different for signal optical field perpendicular or parallel to the crystal c axis (n⊥≠n∥). More importantly, we found an approximately 10% change in index difference Δn=n∥−n⊥ with variation of the waveguide orientation in the a–b plane, and a 60° periodicity was clearly observed. This is attributed to the hexagonal structure of nitride materials.
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This is the published version. Copyright © 2003 American Institute of Physics
Date
2003
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American Institute of Physics
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Birefringence
Citation
Hui, R., Y. Wan, J. Li, S. X. Jin, J. Y. Lin, and H. X. Jiang. "Birefringence of GaN/AlGaN Optical Waveguides." Appl. Phys. Lett. Applied Physics Letters 83.9 (2003): 1698. http://dx.doi.org/10.1063/1.1606103