We have developed a systematic design process for recently proposed slanted grating couplers (SGCs) that operates in the strong coupling regime. Based on rigorous analysis of SGC properties, this design process utilizes the k-vector diagram and a rigorous grating leaky-mode solver to intentionally enforce the phase-match and Bragg conditions. We demonstrate that the resultant SGC designs have performance similar to those obtained by parallel micro-genetic algorithm optimization with the two-dimensional finite-difference time-domain (2D FDTD) method. Only two 2D FDTD simulations are necessary in the later stages of our systematic design process. Therefore the time saving is tremendous compared to a 2D FDTD design tool, which can require thousands of individual 2D FDTD simulation runs. We illustrate the utility of our new systematic design process with an embedded slanted grating coupler example.
© 2006 Optical Society of AmericaFull Article | PDF Article
Shogo Ura, Hironobu Moriguchi, Satoshi Kido, Toshiaki Suhara, and Hiroshi Nishihara
Appl. Opt. 38(12) 2500-2503 (1999)
Bin Wang, Jianhua Jiang, and Gregory P. Nordin
Opt. Express 12(15) 3313-3326 (2004)
Bin Wang, Jianhua Jiang, Diana M. Chambers, Jingbo Cai, and Gregory P. Nordin
Opt. Lett. 30(8) 845-847 (2005)