We report on acousto-optical diffraction of the guided optical modes in GaN layers grown on (0001) sapphire substrates. The diffraction of both transverse electric (TE) and transverse magnetic (TM) modes has been observed. The dependence of the diffraction efficiency on the surface acoustic wave (SAW) power is in good agreement with Raman-Nath theory. The values of acousto-optic figure of merit, and effective photoelastic constants p have been determined. For the SAW propagating in direction, the extracted values are (TE modes) and (TM modes). These values of correspond to 1 and 1.3 of the acousto-optic figure for fused quartz. The obtained results demonstrate the potential of GaN-based structures for the development of blue–ultraviolet acousto-optical devices.
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24 July 2000
Research Article|
July 24 2000
Diffraction of guided optical waves by surface acoustic waves in GaN
R. Rimeika;
R. Rimeika
Laboratory of Physical Acoustics, Vilnius University, 2040 Vilnius, Lithuania
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D. Ciplys;
D. Ciplys
Laboratory of Physical Acoustics, Vilnius University, 2040 Vilnius, Lithuania
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R. Gaska;
R. Gaska
Sensor Electronic Technology, Inc., 21 Cavalier Way, Latham, New York 12110
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J. W. Yang;
J. W. Yang
Department of ECE, University of South Carolina, Columbia, South Carolina 29208
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M. A. Khan;
M. A. Khan
Department of ECE, University of South Carolina, Columbia, South Carolina 29208
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M. S. Shur;
M. S. Shur
Department of ECSE and CIEEM, Rensselaer Polytechnic Institute, Troy, New York 12180
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E. Towe
E. Towe
Department of Electrical Engineering, University of Virginia, Charlottesville, Virginia 22901
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Appl. Phys. Lett. 77, 480–482 (2000)
Article history
Received:
March 27 2000
Accepted:
May 30 2000
Citation
R. Rimeika, D. Ciplys, R. Gaska, J. W. Yang, M. A. Khan, M. S. Shur, E. Towe; Diffraction of guided optical waves by surface acoustic waves in GaN. Appl. Phys. Lett. 24 July 2000; 77 (4): 480–482. https://doi.org/10.1063/1.127017
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