20 dB -enhanced coupling to slot photonic crystal waveguide using multimode interference coupler

The authors experimentally demonstrate a slot photonic crystal structure for guiding light in a sub- 100 - nm -wide low-index region. A multimode interference-based coupling structure is introduced to couple light into such a narrow slot photonic crystal waveguide. A coupler of 1.26 μ m long enhance...

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Bibliographic Details
Published in:Applied physics letters 2007-08, Vol.91 (9), p.091111-091111-3
Main Authors: Chen, Xiaonan, Jiang, Wei, Chen, Jiaqi, Gu, Lanlan, Chen, Ray T.
Format: Article
Language:English
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Summary:The authors experimentally demonstrate a slot photonic crystal structure for guiding light in a sub- 100 - nm -wide low-index region. A multimode interference-based coupling structure is introduced to couple light into such a narrow slot photonic crystal waveguide. A coupler of 1.26 μ m long enhances the coupling efficiency by 20 dB for the quasi-transverse-electric mode over 35 nm optical bandwidth centered at 1562 nm . The measured transmission spectra are in good agreement with the simulated band diagram.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2768640