Compact large-cross-section GaN directional couplers

Zhang, Y. F. and McKnight, L. and Watson, I. M. and Gu, E. D. and Calvez, S. and Dawson, M. D.; (2011) Compact large-cross-section GaN directional couplers. In: Proceedings of the 2011 IEEE Photonics Conference (PHO). IEEE, USA, pp. 407-408. ISBN 9781424489404 (

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We report the design, fabrication and characterization of large-cross-section GaN waveguide directional couplers with mode-converting tapers. A positive RIE lag effect has been shown to significantly reduce overall device footprint.


Zhang, Y. F., McKnight, L., Watson, I. M. ORCID logoORCID:, Gu, E. D. ORCID logoORCID:, Calvez, S. and Dawson, M. D. ORCID logoORCID:;