Topology optimised broadband photonic crystal Y-splitter |
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Authors: | Borel PI Frandsen LH Harpoth A Kristensen M Jensen JS Sigmund O |
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Affiliation: | Res. Center COM, Tech. Univ. of Denmark, Lyngby, Denmark; |
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Abstract: | A planar photonic crystal waveguide Y-splitter that exhibits large-bandwidth low-loss 3 dB splitting for TE-polarised light has been fabricated in silicon-on-insulator material. The high performance is achieved by utilising topology optimisation to design the Y-junction and by using topology optimised low-loss 60/spl deg/ bends. The average excess loss of the entire component is found to be 0.44/spl plusmn/0.29 dB for a 100 nm bandwidth, and the excess loss due to the Y-junction is found to be 0.34/spl plusmn/0.30 dB in a 175 nm bandwidth. |
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