Bottom to in-plane grating coupler with high coupling efficiency and directionality Conference Paper uri icon


  • 2019 SPIE. Here, we have presented the first design of a bottom to in-plane grating coupler with a high coupling efficiency and directionality. The grating coupler consists of a high contrast grating (HCG) and an etched silicon-on-insulator (SOI) grating device. The final coupling efficiency is 82.2% at 1.55m, with a 57nm 3dB bandwidth, and the directionality is 14:1 (left to right ratio). This grating coupler can be further optimized with different low index materials. This grating coupler could work as the vertical to in-plane coupler for the label free silicon photonic bio-sensor.

name of conference

  • Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII

published proceedings

  • Proceedings of SPIE

author list (cited authors)

  • Chen, Y., Ai, B., Heidari, E., Dunbar, B. J., Sorger, V. J., Wong, Z. J., Chen, R. T., & Dalir, H.

citation count

  • 0

complete list of authors

  • Chen, Yixin||Ai, Bin||Heidari, Elham||Dunbar, Bonnie J||Sorger, Volker J||Wong, Zi Jing||Chen, Ray T||Dalir, Hamed

editor list (cited editors)

  • Sadwick, L. P., & Yang, T.

publication date

  • March 2019