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Opt Express. 2010 Jun 7;18(12):13173-9. doi: 10.1364/OE.18.013173.

Broadband coupler between silicon waveguide and hybrid plasmonic waveguide.

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  • 1Laboratory of Photonics and Microwave Engineering, School of Information and Communication Technology, Royal Institute of Technology, Electrum 229, 164 40 Kista, Sweden.


Efficient broadband coupling of light between a dielectric waveguide and a hybrid plasmonic waveguide is investigated theoretically. A plasmonic linear taper is used as a coupler which connects the two types of waveguides. Broadband coupling is realized by such a compact plasmonic taper with a length of only 0.4 microm, which achieves a coupling efficiency of 70% (1.5 dB) at the 1.55 microm telecommunication wavelength.

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