Abstract
We report experimental results for the band structure of 2-dimensional triangular photonic crystals of air holes in an epitaxial group III–nitride waveguide film. Surface coupling techniques enable the observation of sharp resonance dips in the transmission spectra due to a resonance phenomenon between the incident light and Bloch modes of the photonic crystal. The position of the dips has been measured as a function of angle of incidence and the photonic band structure has been successfully constructed by the measurement. Corresponding Bloch-mode group velocities have also been obtained.
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Received: 28 May 2001 / Published online: 23 October 2001
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Coquillat, D., Ribayrol, A., De La Rue, R. et al. Observations of band structure and reduced group velocity in epitaxial GaN–sapphire 2D photonic crystals. Appl Phys B 73, 591–593 (2001). https://doi.org/10.1007/s003400100660
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DOI: https://doi.org/10.1007/s003400100660