A new design for coupling light between silicon strip waveguide and plasmonic slot waveguide

Bingqing Zhu; H. K. Tsang

doi:10.1117/12.2211575

15 March 2016 A new design for coupling light between silicon strip waveguide and plasmonic slot waveguide

Bingqing Zhu, H. K. Tsang

Proceedings Volume 9753, Optical Interconnects XVI; 97531A (2016) https://doi.org/10.1117/12.2211575
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

We simulate and test a new structure for light coupling from silicon strip waveguide to plasmonic slot waveguide. The conventional approach of simply using a taper-funnel structure for the mode matching between two types of waveguides is typically insufficient for high coupling efficiency. Here we propose the use of an additional silicon strip-to-slot mode converter, which has a low insertion loss itself and achieves better mode matching. The experimental results show the new design, with slot width fixed at 200nm, achieves a higher coupling efficiency than conventional one. The newly implemented design has 1.5 dB less loss than the conventional taper-funnel coupler, with a theoretical coupling loss of 2.18 dB/coupler and an experimentally measured loss of 3 dB/coupler at 1640nm wavelength.

Citation Download Citation

Bingqing Zhu and H. K. Tsang "A new design for coupling light between silicon strip waveguide and plasmonic slot waveguide", Proc. SPIE 9753, Optical Interconnects XVI, 97531A (15 March 2016); https://doi.org/10.1117/12.2211575

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