1. Drop Filters with Side Walled Grating Resonators 2012 CMC-UBC Silicon Nanophotonics Workshop David Patel (david.patel@mail.mcgill.ca), July 5 th 2012

2. Intro  About me  Structure based on paper  Professor Kirk (McGill) and Professor Aimez (Sherbrooke)

3. Drop filter with sidewall gratings  Structure Figure 1 from [1]

4. Analysis  2D-FDTD simulation  Eigenmode expansion method Figure 3 from [1].

5. Variations  Air-gap width between bus waveguide and resonators  Reducing gaps: ER ↑, BW ↓  Slight shift in resonance Figure 4 from [1]

6. Variations  Number of cavities in series  More cavities -> wider pass band  Manufacturing Figure 5 from [1].

7. Reference  V. Veerasubramanian, G. Beaudin, A. Giguère, B. Le Drogoff, V. Aimez, and A. Kirk, "Waveguide-coupled drop filters on SOI using quarter-wave shifted sidewalled grating resonators," Opt. Express 20, 15983-15990 (2012). Thanks