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Proceedings Paper

Ultra-compact broadband nanowire-to-slot waveguide mode converter based on SOI
Author(s): Ying Qi; Junming An; Yue Wang; Xiaoguang Zhang
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Paper Abstract

A novel ultra-compact high-efficiency broadband mode converter between silicon (Si) nanowire and silicon slot waveguide based on Silicon-on-Insulator (SOI) is proposed in this paper. By introducing a gradual-width structure between Si nanowire and slot waveguide, the favorable transition between nanowire mode (Gaussian-like mode) and slot mode (non-Gaussian-like mode) can be obtained and then the coupling efficiency is improved. The structure is simulated and optimized by using the three-dimension Finite-Difference Time-Domain Method (3D-FDTD). The coupling efficiency of over 90% within bandwidth of over 600nm can be achieved by only 200nm-length converter which is the smallest size to our knowledge. This presented mode converter can meet the demand of ultra-compact, wavelength-insensitive of monolithic integration.

Paper Details

Date Published: 13 November 2014
PDF: 6 pages
Proc. SPIE 9277, Nanophotonics and Micro/Nano Optics II, 92770B (13 November 2014); doi: 10.1117/12.2071523
Show Author Affiliations
Ying Qi, Institute of Semiconductors (China)
Junming An, Institute of Semiconductors (China)
Yue Wang, Institute of Semiconductors (China)
Xiaoguang Zhang, Institute of Semiconductors (China)

Published in SPIE Proceedings Vol. 9277:
Nanophotonics and Micro/Nano Optics II
Zhiping Zhou; Kazumi Wada, Editor(s)

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