20 December 2004 Second-order Bragg waveguide grating as a 1D photonic bandgap structure in SOI waveguide
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Abstract
A study of the modal reflection, transmission and radiation properties of deeply etched second-order Bragg waveguide gratings in silicon-on-insulator (SOI) slab waveguide is presented. Both the eigenmode expansion method and the finite-difference time-domain method have been used to model this structure. High reflection can be obtained with a very short grating structure. The out-of-plane coupling efficiency and directionality can be controlled by the grating depth and groove shape. This structure has potential for use in micro-cavity laser, compact outcouplers and incouplers, and surface-emitting lasers. We propose an application example which involves a double-grating coupler to realize efficient coupling between vertically integrated SOI waveguides over short distances. Experimental results will be presented.
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Po Dong, Andrew G. Kirk, "Second-order Bragg waveguide grating as a 1D photonic bandgap structure in SOI waveguide", Proc. SPIE 5577, Photonics North 2004: Optical Components and Devices, (20 December 2004); doi: 10.1117/12.567374; https://doi.org/10.1117/12.567374
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