Highly efficient double-taper-type coupler between III–V/silicon-on-insulator hybrid device and silicon waveguide

J. Suzuki, F. Tachibana, K. Nagasaka, M. Eissa, L. Bai, T. Mitarai, T. Amemiya, N. Nishiyama, S. Arai, Japanese Journal of Applied Physics, Vol. 57, No. 9, 094101.