High-Efficiency Light Coupling in a Submicrometric Silicon-on-Insulator Waveguide.
Light coupling into a sub-micrometer-thick waveguide is usually done through a grating coupler. Coupling efficiency is strongly enhanced by addition of a mirror above the grating. This new kind of coupler can be designed to achieve efficiencies as great as 80%. Numerical calculations for a high-angular-spread Gaussian incident beam are compared with experimental results obtained for a standard silicon-on-insulator waveguide.
Orobtchouk
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R
Layadi
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Gualous
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H
Pascal
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D
Koster
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A
Laval
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