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Proceedings Paper

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

Paper Details

Date Published: 15 March 2016
PDF: 6 pages
Proc. SPIE 9753, Optical Interconnects XVI, 97531A (15 March 2016); doi: 10.1117/12.2211575
Show Author Affiliations
Bingqing Zhu, The Chinese Univ. of Hong Kong (Hong Kong, China)
H. K. Tsang, The Chinese Univ. of Hong Kong (Hong Kong, China)

Published in SPIE Proceedings Vol. 9753:
Optical Interconnects XVI
Henning Schröder; Ray T. Chen, Editor(s)

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