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Band-Structure Approach to Synthesis of Grating Couplers with Ultra-High Coupling Efficiency and Directivity

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We propose a complex-wavevector band-structure approach to synthesis of fiber-to-chip grating couplers, and show apodized bi-level designs with 95% coupling efficiency and 99% directivity using only two device layers of a monolithic SOI CMOS process.

© 2015 Optical Society of America

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