High  Efficiency Inter-Layer Apodized Grating Coupler with Metal Mirrors toward 3D Optical Interconnection

Y. Kuno, J. Kang, Y. Hayashi, J. Suzuki, T. Amemiya, N. Nishiyama, S. Arai, 4th International Symposium on Photonics and Electronics Convergence (ISPEC 2014), P-7, Nov. 2014.