20 dB -enhanced coupling to slot photonic crystal waveguide using multimode interference coupler
- 27 August 2007
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 91 (9) , 091111
- https://doi.org/10.1063/1.2768640
Abstract
The authors experimentally demonstrate a slot photonic crystalstructure 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.Keywords
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