| A Novel Design of Grating Couplers for Efficient Broadband Coupling between Silicon-on-Insulator Nanophotonic Waveguides and Fibres |
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| 作者姓名： | 余和军 余金中 |
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| 作者单位： | State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences,Beijing 100083 |
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| 基金项目： | Supported by the Special Fund for Major State Basic Research Project of China under Grant No G20000366, and the National High Technology Programme of China under Grant No 2002AA312060. |
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| 摘 要： |
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| 关 键 词： | 硅绝缘体 纳米光子波导 光学纤维 能隙带宽 |
| 收稿时间： | 2005-07-14 |
| 修稿时间： | 2005-07-14 |
A Novel Design of Grating Couplers for Efficient Broadband Coupling between Silicon-on-Insulator Nanophotonic Waveguides and Fibres |
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| YU He-Jun, YU Jin-Zhong.A Novel Design of Grating Couplers for Efficient Broadband Coupling between Silicon-on-Insulator Nanophotonic Waveguides and Fibres[J].Chinese Physics Letters,2005,22(11):2865-2868. |
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| Authors: | YU He-Jun YU Jin-Zhong |
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| Abstract: | A novel design of out-of-plane grating couplers is proposed for coupling between silicon-on-insulator nanophotonic waveguides and single-mode fibres. The coupler with the first-order diffraction coupling to the optical fibre is actually a second-order reflected grating with two times of period of the first-order grating. To enhance outcoupled power, a back hole is designed to form in the silicon substrate and a kind of metals is placed on the top acting as a reflection layer. The coupler is optimized using coupled-mode-based simulations, showing that the coupling efficiency to and from tapered optical fibre can be as high as 85% with 1dB bandwidth about 23 nm. |
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